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Merge branch 'tee/initial-merge' into fixes
This is a dependency for the following fix * tee/initial-merge: arm64: dt: hikey: Add optee node Documentation: tee subsystem and op-tee driver tee: add OP-TEE driver tee: generic TEE subsystem dt/bindings: add bindings for optee
This commit is contained in:
Arnd Bergmann
commit
e038d5515b
@ -412,6 +412,8 @@ sysctl/
|
||||
- directory with info on the /proc/sys/* files.
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target/
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||||
- directory with info on generating TCM v4 fabric .ko modules
|
||||
tee.txt
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- info on the TEE subsystem and drivers
|
||||
this_cpu_ops.txt
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- List rationale behind and the way to use this_cpu operations.
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thermal/
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@ -0,0 +1,31 @@
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OP-TEE Device Tree Bindings
|
||||
|
||||
OP-TEE is a piece of software using hardware features to provide a Trusted
|
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Execution Environment. The security can be provided with ARM TrustZone, but
|
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also by virtualization or a separate chip.
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We're using "linaro" as the first part of the compatible property for
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the reference implementation maintained by Linaro.
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* OP-TEE based on ARM TrustZone required properties:
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- compatible : should contain "linaro,optee-tz"
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- method : The method of calling the OP-TEE Trusted OS. Permitted
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values are:
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"smc" : SMC #0, with the register assignments specified
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in drivers/tee/optee/optee_smc.h
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"hvc" : HVC #0, with the register assignments specified
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in drivers/tee/optee/optee_smc.h
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Example:
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firmware {
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optee {
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compatible = "linaro,optee-tz";
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method = "smc";
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};
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};
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@ -173,6 +173,7 @@ lego LEGO Systems A/S
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lenovo Lenovo Group Ltd.
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lg LG Corporation
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licheepi Lichee Pi
|
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linaro Linaro Limited
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linux Linux-specific binding
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lltc Linear Technology Corporation
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lsi LSI Corp. (LSI Logic)
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@ -309,6 +309,7 @@ Code Seq#(hex) Include File Comments
|
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0xA3 80-8F Port ACL in development:
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<mailto:tlewis@mindspring.com>
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0xA3 90-9F linux/dtlk.h
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0xA4 00-1F uapi/linux/tee.h Generic TEE subsystem
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0xAA 00-3F linux/uapi/linux/userfaultfd.h
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0xAB 00-1F linux/nbd.h
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0xAC 00-1F linux/raw.h
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118
Documentation/tee.txt
Normal file
118
Documentation/tee.txt
Normal file
@ -0,0 +1,118 @@
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TEE subsystem
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This document describes the TEE subsystem in Linux.
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A TEE (Trusted Execution Environment) is a trusted OS running in some
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secure environment, for example, TrustZone on ARM CPUs, or a separate
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secure co-processor etc. A TEE driver handles the details needed to
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communicate with the TEE.
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||||
|
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This subsystem deals with:
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- Registration of TEE drivers
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- Managing shared memory between Linux and the TEE
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- Providing a generic API to the TEE
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The TEE interface
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=================
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include/uapi/linux/tee.h defines the generic interface to a TEE.
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User space (the client) connects to the driver by opening /dev/tee[0-9]* or
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/dev/teepriv[0-9]*.
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- TEE_IOC_SHM_ALLOC allocates shared memory and returns a file descriptor
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which user space can mmap. When user space doesn't need the file
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descriptor any more, it should be closed. When shared memory isn't needed
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any longer it should be unmapped with munmap() to allow the reuse of
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memory.
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- TEE_IOC_VERSION lets user space know which TEE this driver handles and
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the its capabilities.
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- TEE_IOC_OPEN_SESSION opens a new session to a Trusted Application.
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|
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- TEE_IOC_INVOKE invokes a function in a Trusted Application.
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- TEE_IOC_CANCEL may cancel an ongoing TEE_IOC_OPEN_SESSION or TEE_IOC_INVOKE.
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||||
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- TEE_IOC_CLOSE_SESSION closes a session to a Trusted Application.
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||||
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There are two classes of clients, normal clients and supplicants. The latter is
|
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a helper process for the TEE to access resources in Linux, for example file
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system access. A normal client opens /dev/tee[0-9]* and a supplicant opens
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/dev/teepriv[0-9].
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|
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Much of the communication between clients and the TEE is opaque to the
|
||||
driver. The main job for the driver is to receive requests from the
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clients, forward them to the TEE and send back the results. In the case of
|
||||
supplicants the communication goes in the other direction, the TEE sends
|
||||
requests to the supplicant which then sends back the result.
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|
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OP-TEE driver
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=============
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The OP-TEE driver handles OP-TEE [1] based TEEs. Currently it is only the ARM
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TrustZone based OP-TEE solution that is supported.
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Lowest level of communication with OP-TEE builds on ARM SMC Calling
|
||||
Convention (SMCCC) [2], which is the foundation for OP-TEE's SMC interface
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||||
[3] used internally by the driver. Stacked on top of that is OP-TEE Message
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Protocol [4].
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||||
OP-TEE SMC interface provides the basic functions required by SMCCC and some
|
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additional functions specific for OP-TEE. The most interesting functions are:
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- OPTEE_SMC_FUNCID_CALLS_UID (part of SMCCC) returns the version information
|
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which is then returned by TEE_IOC_VERSION
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- OPTEE_SMC_CALL_GET_OS_UUID returns the particular OP-TEE implementation, used
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to tell, for instance, a TrustZone OP-TEE apart from an OP-TEE running on a
|
||||
separate secure co-processor.
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||||
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||||
- OPTEE_SMC_CALL_WITH_ARG drives the OP-TEE message protocol
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||||
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- OPTEE_SMC_GET_SHM_CONFIG lets the driver and OP-TEE agree on which memory
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range to used for shared memory between Linux and OP-TEE.
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The GlobalPlatform TEE Client API [5] is implemented on top of the generic
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TEE API.
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Picture of the relationship between the different components in the
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OP-TEE architecture.
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User space Kernel Secure world
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~~~~~~~~~~ ~~~~~~ ~~~~~~~~~~~~
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+--------+ +-------------+
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| Client | | Trusted |
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+--------+ | Application |
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/\ +-------------+
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||||
|| +----------+ /\
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|| |tee- | ||
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|| |supplicant| \/
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|| +----------+ +-------------+
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\/ /\ | TEE Internal|
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+-------+ || | API |
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||||
+ TEE | || +--------+--------+ +-------------+
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| Client| || | TEE | OP-TEE | | OP-TEE |
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| API | \/ | subsys | driver | | Trusted OS |
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+-------+----------------+----+-------+----+-----------+-------------+
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| Generic TEE API | | OP-TEE MSG |
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| IOCTL (TEE_IOC_*) | | SMCCC (OPTEE_SMC_CALL_*) |
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||||
+-----------------------------+ +------------------------------+
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||||
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RPC (Remote Procedure Call) are requests from secure world to kernel driver
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or tee-supplicant. An RPC is identified by a special range of SMCCC return
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values from OPTEE_SMC_CALL_WITH_ARG. RPC messages which are intended for the
|
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kernel are handled by the kernel driver. Other RPC messages will be forwarded to
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tee-supplicant without further involvement of the driver, except switching
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shared memory buffer representation.
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References:
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[1] https://github.com/OP-TEE/optee_os
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||||
[2] http://infocenter.arm.com/help/topic/com.arm.doc.den0028a/index.html
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||||
[3] drivers/tee/optee/optee_smc.h
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||||
[4] drivers/tee/optee/optee_msg.h
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||||
[5] http://www.globalplatform.org/specificationsdevice.asp look for
|
||||
"TEE Client API Specification v1.0" and click download.
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||||
13
MAINTAINERS
13
MAINTAINERS
@ -9515,6 +9515,11 @@ F: arch/*/oprofile/
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F: drivers/oprofile/
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||||
F: include/linux/oprofile.h
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||||
|
||||
OP-TEE DRIVER
|
||||
M: Jens Wiklander <jens.wiklander@linaro.org>
|
||||
S: Maintained
|
||||
F: drivers/tee/optee/
|
||||
|
||||
ORACLE CLUSTER FILESYSTEM 2 (OCFS2)
|
||||
M: Mark Fasheh <mfasheh@versity.com>
|
||||
M: Joel Becker <jlbec@evilplan.org>
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||||
@ -11296,6 +11301,14 @@ F: drivers/hwtracing/stm/
|
||||
F: include/linux/stm.h
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||||
F: include/uapi/linux/stm.h
|
||||
|
||||
TEE SUBSYSTEM
|
||||
M: Jens Wiklander <jens.wiklander@linaro.org>
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||||
S: Maintained
|
||||
F: include/linux/tee_drv.h
|
||||
F: include/uapi/linux/tee.h
|
||||
F: drivers/tee/
|
||||
F: Documentation/tee.txt
|
||||
|
||||
THUNDERBOLT DRIVER
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||||
M: Andreas Noever <andreas.noever@gmail.com>
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||||
S: Maintained
|
||||
|
||||
@ -411,6 +411,13 @@
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||||
};
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||||
};
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||||
};
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||||
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||||
firmware {
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||||
optee {
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||||
compatible = "linaro,optee-tz";
|
||||
method = "smc";
|
||||
};
|
||||
};
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||||
};
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||||
|
||||
&uart2 {
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||||
|
||||
@ -204,4 +204,6 @@ source "drivers/fpga/Kconfig"
|
||||
|
||||
source "drivers/fsi/Kconfig"
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||||
|
||||
source "drivers/tee/Kconfig"
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||||
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||||
endmenu
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||||
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||||
@ -180,3 +180,4 @@ obj-$(CONFIG_ANDROID) += android/
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obj-$(CONFIG_NVMEM) += nvmem/
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obj-$(CONFIG_FPGA) += fpga/
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obj-$(CONFIG_FSI) += fsi/
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obj-$(CONFIG_TEE) += tee/
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18
drivers/tee/Kconfig
Normal file
18
drivers/tee/Kconfig
Normal file
@ -0,0 +1,18 @@
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# Generic Trusted Execution Environment Configuration
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config TEE
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tristate "Trusted Execution Environment support"
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select DMA_SHARED_BUFFER
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select GENERIC_ALLOCATOR
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help
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This implements a generic interface towards a Trusted Execution
|
||||
Environment (TEE).
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|
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if TEE
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|
||||
menu "TEE drivers"
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source "drivers/tee/optee/Kconfig"
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|
||||
endmenu
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||||
|
||||
endif
|
||||
5
drivers/tee/Makefile
Normal file
5
drivers/tee/Makefile
Normal file
@ -0,0 +1,5 @@
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obj-$(CONFIG_TEE) += tee.o
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tee-objs += tee_core.o
|
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tee-objs += tee_shm.o
|
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tee-objs += tee_shm_pool.o
|
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obj-$(CONFIG_OPTEE) += optee/
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7
drivers/tee/optee/Kconfig
Normal file
7
drivers/tee/optee/Kconfig
Normal file
@ -0,0 +1,7 @@
|
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# OP-TEE Trusted Execution Environment Configuration
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config OPTEE
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tristate "OP-TEE"
|
||||
depends on HAVE_ARM_SMCCC
|
||||
help
|
||||
This implements the OP-TEE Trusted Execution Environment (TEE)
|
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driver.
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5
drivers/tee/optee/Makefile
Normal file
5
drivers/tee/optee/Makefile
Normal file
@ -0,0 +1,5 @@
|
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obj-$(CONFIG_OPTEE) += optee.o
|
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optee-objs += core.o
|
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optee-objs += call.o
|
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optee-objs += rpc.o
|
||||
optee-objs += supp.o
|
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444
drivers/tee/optee/call.c
Normal file
444
drivers/tee/optee/call.c
Normal file
@ -0,0 +1,444 @@
|
||||
/*
|
||||
* Copyright (c) 2015, Linaro Limited
|
||||
*
|
||||
* This software is licensed under the terms of the GNU General Public
|
||||
* License version 2, as published by the Free Software Foundation, and
|
||||
* may be copied, distributed, and modified under those terms.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
*/
|
||||
#include <linux/arm-smccc.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/err.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/tee_drv.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/uaccess.h>
|
||||
#include "optee_private.h"
|
||||
#include "optee_smc.h"
|
||||
|
||||
struct optee_call_waiter {
|
||||
struct list_head list_node;
|
||||
struct completion c;
|
||||
};
|
||||
|
||||
static void optee_cq_wait_init(struct optee_call_queue *cq,
|
||||
struct optee_call_waiter *w)
|
||||
{
|
||||
/*
|
||||
* We're preparing to make a call to secure world. In case we can't
|
||||
* allocate a thread in secure world we'll end up waiting in
|
||||
* optee_cq_wait_for_completion().
|
||||
*
|
||||
* Normally if there's no contention in secure world the call will
|
||||
* complete and we can cleanup directly with optee_cq_wait_final().
|
||||
*/
|
||||
mutex_lock(&cq->mutex);
|
||||
|
||||
/*
|
||||
* We add ourselves to the queue, but we don't wait. This
|
||||
* guarantees that we don't lose a completion if secure world
|
||||
* returns busy and another thread just exited and try to complete
|
||||
* someone.
|
||||
*/
|
||||
init_completion(&w->c);
|
||||
list_add_tail(&w->list_node, &cq->waiters);
|
||||
|
||||
mutex_unlock(&cq->mutex);
|
||||
}
|
||||
|
||||
static void optee_cq_wait_for_completion(struct optee_call_queue *cq,
|
||||
struct optee_call_waiter *w)
|
||||
{
|
||||
wait_for_completion(&w->c);
|
||||
|
||||
mutex_lock(&cq->mutex);
|
||||
|
||||
/* Move to end of list to get out of the way for other waiters */
|
||||
list_del(&w->list_node);
|
||||
reinit_completion(&w->c);
|
||||
list_add_tail(&w->list_node, &cq->waiters);
|
||||
|
||||
mutex_unlock(&cq->mutex);
|
||||
}
|
||||
|
||||
static void optee_cq_complete_one(struct optee_call_queue *cq)
|
||||
{
|
||||
struct optee_call_waiter *w;
|
||||
|
||||
list_for_each_entry(w, &cq->waiters, list_node) {
|
||||
if (!completion_done(&w->c)) {
|
||||
complete(&w->c);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void optee_cq_wait_final(struct optee_call_queue *cq,
|
||||
struct optee_call_waiter *w)
|
||||
{
|
||||
/*
|
||||
* We're done with the call to secure world. The thread in secure
|
||||
* world that was used for this call is now available for some
|
||||
* other task to use.
|
||||
*/
|
||||
mutex_lock(&cq->mutex);
|
||||
|
||||
/* Get out of the list */
|
||||
list_del(&w->list_node);
|
||||
|
||||
/* Wake up one eventual waiting task */
|
||||
optee_cq_complete_one(cq);
|
||||
|
||||
/*
|
||||
* If we're completed we've got a completion from another task that
|
||||
* was just done with its call to secure world. Since yet another
|
||||
* thread now is available in secure world wake up another eventual
|
||||
* waiting task.
|
||||
*/
|
||||
if (completion_done(&w->c))
|
||||
optee_cq_complete_one(cq);
|
||||
|
||||
mutex_unlock(&cq->mutex);
|
||||
}
|
||||
|
||||
/* Requires the filpstate mutex to be held */
|
||||
static struct optee_session *find_session(struct optee_context_data *ctxdata,
|
||||
u32 session_id)
|
||||
{
|
||||
struct optee_session *sess;
|
||||
|
||||
list_for_each_entry(sess, &ctxdata->sess_list, list_node)
|
||||
if (sess->session_id == session_id)
|
||||
return sess;
|
||||
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/**
|
||||
* optee_do_call_with_arg() - Do an SMC to OP-TEE in secure world
|
||||
* @ctx: calling context
|
||||
* @parg: physical address of message to pass to secure world
|
||||
*
|
||||
* Does and SMC to OP-TEE in secure world and handles eventual resulting
|
||||
* Remote Procedure Calls (RPC) from OP-TEE.
|
||||
*
|
||||
* Returns return code from secure world, 0 is OK
|
||||
*/
|
||||
u32 optee_do_call_with_arg(struct tee_context *ctx, phys_addr_t parg)
|
||||
{
|
||||
struct optee *optee = tee_get_drvdata(ctx->teedev);
|
||||
struct optee_call_waiter w;
|
||||
struct optee_rpc_param param = { };
|
||||
u32 ret;
|
||||
|
||||
param.a0 = OPTEE_SMC_CALL_WITH_ARG;
|
||||
reg_pair_from_64(¶m.a1, ¶m.a2, parg);
|
||||
/* Initialize waiter */
|
||||
optee_cq_wait_init(&optee->call_queue, &w);
|
||||
while (true) {
|
||||
struct arm_smccc_res res;
|
||||
|
||||
optee->invoke_fn(param.a0, param.a1, param.a2, param.a3,
|
||||
param.a4, param.a5, param.a6, param.a7,
|
||||
&res);
|
||||
|
||||
if (res.a0 == OPTEE_SMC_RETURN_ETHREAD_LIMIT) {
|
||||
/*
|
||||
* Out of threads in secure world, wait for a thread
|
||||
* become available.
|
||||
*/
|
||||
optee_cq_wait_for_completion(&optee->call_queue, &w);
|
||||
} else if (OPTEE_SMC_RETURN_IS_RPC(res.a0)) {
|
||||
param.a0 = res.a0;
|
||||
param.a1 = res.a1;
|
||||
param.a2 = res.a2;
|
||||
param.a3 = res.a3;
|
||||
optee_handle_rpc(ctx, ¶m);
|
||||
} else {
|
||||
ret = res.a0;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* We're done with our thread in secure world, if there's any
|
||||
* thread waiters wake up one.
|
||||
*/
|
||||
optee_cq_wait_final(&optee->call_queue, &w);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static struct tee_shm *get_msg_arg(struct tee_context *ctx, size_t num_params,
|
||||
struct optee_msg_arg **msg_arg,
|
||||
phys_addr_t *msg_parg)
|
||||
{
|
||||
int rc;
|
||||
struct tee_shm *shm;
|
||||
struct optee_msg_arg *ma;
|
||||
|
||||
shm = tee_shm_alloc(ctx, OPTEE_MSG_GET_ARG_SIZE(num_params),
|
||||
TEE_SHM_MAPPED);
|
||||
if (IS_ERR(shm))
|
||||
return shm;
|
||||
|
||||
ma = tee_shm_get_va(shm, 0);
|
||||
if (IS_ERR(ma)) {
|
||||
rc = PTR_ERR(ma);
|
||||
goto out;
|
||||
}
|
||||
|
||||
rc = tee_shm_get_pa(shm, 0, msg_parg);
|
||||
if (rc)
|
||||
goto out;
|
||||
|
||||
memset(ma, 0, OPTEE_MSG_GET_ARG_SIZE(num_params));
|
||||
ma->num_params = num_params;
|
||||
*msg_arg = ma;
|
||||
out:
|
||||
if (rc) {
|
||||
tee_shm_free(shm);
|
||||
return ERR_PTR(rc);
|
||||
}
|
||||
|
||||
return shm;
|
||||
}
|
||||
|
||||
int optee_open_session(struct tee_context *ctx,
|
||||
struct tee_ioctl_open_session_arg *arg,
|
||||
struct tee_param *param)
|
||||
{
|
||||
struct optee_context_data *ctxdata = ctx->data;
|
||||
int rc;
|
||||
struct tee_shm *shm;
|
||||
struct optee_msg_arg *msg_arg;
|
||||
phys_addr_t msg_parg;
|
||||
struct optee_session *sess = NULL;
|
||||
|
||||
/* +2 for the meta parameters added below */
|
||||
shm = get_msg_arg(ctx, arg->num_params + 2, &msg_arg, &msg_parg);
|
||||
if (IS_ERR(shm))
|
||||
return PTR_ERR(shm);
|
||||
|
||||
msg_arg->cmd = OPTEE_MSG_CMD_OPEN_SESSION;
|
||||
msg_arg->cancel_id = arg->cancel_id;
|
||||
|
||||
/*
|
||||
* Initialize and add the meta parameters needed when opening a
|
||||
* session.
|
||||
*/
|
||||
msg_arg->params[0].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT |
|
||||
OPTEE_MSG_ATTR_META;
|
||||
msg_arg->params[1].attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT |
|
||||
OPTEE_MSG_ATTR_META;
|
||||
memcpy(&msg_arg->params[0].u.value, arg->uuid, sizeof(arg->uuid));
|
||||
memcpy(&msg_arg->params[1].u.value, arg->uuid, sizeof(arg->clnt_uuid));
|
||||
msg_arg->params[1].u.value.c = arg->clnt_login;
|
||||
|
||||
rc = optee_to_msg_param(msg_arg->params + 2, arg->num_params, param);
|
||||
if (rc)
|
||||
goto out;
|
||||
|
||||
sess = kzalloc(sizeof(*sess), GFP_KERNEL);
|
||||
if (!sess) {
|
||||
rc = -ENOMEM;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (optee_do_call_with_arg(ctx, msg_parg)) {
|
||||
msg_arg->ret = TEEC_ERROR_COMMUNICATION;
|
||||
msg_arg->ret_origin = TEEC_ORIGIN_COMMS;
|
||||
}
|
||||
|
||||
if (msg_arg->ret == TEEC_SUCCESS) {
|
||||
/* A new session has been created, add it to the list. */
|
||||
sess->session_id = msg_arg->session;
|
||||
mutex_lock(&ctxdata->mutex);
|
||||
list_add(&sess->list_node, &ctxdata->sess_list);
|
||||
mutex_unlock(&ctxdata->mutex);
|
||||
} else {
|
||||
kfree(sess);
|
||||
}
|
||||
|
||||
if (optee_from_msg_param(param, arg->num_params, msg_arg->params + 2)) {
|
||||
arg->ret = TEEC_ERROR_COMMUNICATION;
|
||||
arg->ret_origin = TEEC_ORIGIN_COMMS;
|
||||
/* Close session again to avoid leakage */
|
||||
optee_close_session(ctx, msg_arg->session);
|
||||
} else {
|
||||
arg->session = msg_arg->session;
|
||||
arg->ret = msg_arg->ret;
|
||||
arg->ret_origin = msg_arg->ret_origin;
|
||||
}
|
||||
out:
|
||||
tee_shm_free(shm);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
int optee_close_session(struct tee_context *ctx, u32 session)
|
||||
{
|
||||
struct optee_context_data *ctxdata = ctx->data;
|
||||
struct tee_shm *shm;
|
||||
struct optee_msg_arg *msg_arg;
|
||||
phys_addr_t msg_parg;
|
||||
struct optee_session *sess;
|
||||
|
||||
/* Check that the session is valid and remove it from the list */
|
||||
mutex_lock(&ctxdata->mutex);
|
||||
sess = find_session(ctxdata, session);
|
||||
if (sess)
|
||||
list_del(&sess->list_node);
|
||||
mutex_unlock(&ctxdata->mutex);
|
||||
if (!sess)
|
||||
return -EINVAL;
|
||||
kfree(sess);
|
||||
|
||||
shm = get_msg_arg(ctx, 0, &msg_arg, &msg_parg);
|
||||
if (IS_ERR(shm))
|
||||
return PTR_ERR(shm);
|
||||
|
||||
msg_arg->cmd = OPTEE_MSG_CMD_CLOSE_SESSION;
|
||||
msg_arg->session = session;
|
||||
optee_do_call_with_arg(ctx, msg_parg);
|
||||
|
||||
tee_shm_free(shm);
|
||||
return 0;
|
||||
}
|
||||
|
||||
int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg,
|
||||
struct tee_param *param)
|
||||
{
|
||||
struct optee_context_data *ctxdata = ctx->data;
|
||||
struct tee_shm *shm;
|
||||
struct optee_msg_arg *msg_arg;
|
||||
phys_addr_t msg_parg;
|
||||
struct optee_session *sess;
|
||||
int rc;
|
||||
|
||||
/* Check that the session is valid */
|
||||
mutex_lock(&ctxdata->mutex);
|
||||
sess = find_session(ctxdata, arg->session);
|
||||
mutex_unlock(&ctxdata->mutex);
|
||||
if (!sess)
|
||||
return -EINVAL;
|
||||
|
||||
shm = get_msg_arg(ctx, arg->num_params, &msg_arg, &msg_parg);
|
||||
if (IS_ERR(shm))
|
||||
return PTR_ERR(shm);
|
||||
msg_arg->cmd = OPTEE_MSG_CMD_INVOKE_COMMAND;
|
||||
msg_arg->func = arg->func;
|
||||
msg_arg->session = arg->session;
|
||||
msg_arg->cancel_id = arg->cancel_id;
|
||||
|
||||
rc = optee_to_msg_param(msg_arg->params, arg->num_params, param);
|
||||
if (rc)
|
||||
goto out;
|
||||
|
||||
if (optee_do_call_with_arg(ctx, msg_parg)) {
|
||||
msg_arg->ret = TEEC_ERROR_COMMUNICATION;
|
||||
msg_arg->ret_origin = TEEC_ORIGIN_COMMS;
|
||||
}
|
||||
|
||||
if (optee_from_msg_param(param, arg->num_params, msg_arg->params)) {
|
||||
msg_arg->ret = TEEC_ERROR_COMMUNICATION;
|
||||
msg_arg->ret_origin = TEEC_ORIGIN_COMMS;
|
||||
}
|
||||
|
||||
arg->ret = msg_arg->ret;
|
||||
arg->ret_origin = msg_arg->ret_origin;
|
||||
out:
|
||||
tee_shm_free(shm);
|
||||
return rc;
|
||||
}
|
||||
|
||||
int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session)
|
||||
{
|
||||
struct optee_context_data *ctxdata = ctx->data;
|
||||
struct tee_shm *shm;
|
||||
struct optee_msg_arg *msg_arg;
|
||||
phys_addr_t msg_parg;
|
||||
struct optee_session *sess;
|
||||
|
||||
/* Check that the session is valid */
|
||||
mutex_lock(&ctxdata->mutex);
|
||||
sess = find_session(ctxdata, session);
|
||||
mutex_unlock(&ctxdata->mutex);
|
||||
if (!sess)
|
||||
return -EINVAL;
|
||||
|
||||
shm = get_msg_arg(ctx, 0, &msg_arg, &msg_parg);
|
||||
if (IS_ERR(shm))
|
||||
return PTR_ERR(shm);
|
||||
|
||||
msg_arg->cmd = OPTEE_MSG_CMD_CANCEL;
|
||||
msg_arg->session = session;
|
||||
msg_arg->cancel_id = cancel_id;
|
||||
optee_do_call_with_arg(ctx, msg_parg);
|
||||
|
||||
tee_shm_free(shm);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* optee_enable_shm_cache() - Enables caching of some shared memory allocation
|
||||
* in OP-TEE
|
||||
* @optee: main service struct
|
||||
*/
|
||||
void optee_enable_shm_cache(struct optee *optee)
|
||||
{
|
||||
struct optee_call_waiter w;
|
||||
|
||||
/* We need to retry until secure world isn't busy. */
|
||||
optee_cq_wait_init(&optee->call_queue, &w);
|
||||
while (true) {
|
||||
struct arm_smccc_res res;
|
||||
|
||||
optee->invoke_fn(OPTEE_SMC_ENABLE_SHM_CACHE, 0, 0, 0, 0, 0, 0,
|
||||
0, &res);
|
||||
if (res.a0 == OPTEE_SMC_RETURN_OK)
|
||||
break;
|
||||
optee_cq_wait_for_completion(&optee->call_queue, &w);
|
||||
}
|
||||
optee_cq_wait_final(&optee->call_queue, &w);
|
||||
}
|
||||
|
||||
/**
|
||||
* optee_disable_shm_cache() - Disables caching of some shared memory allocation
|
||||
* in OP-TEE
|
||||
* @optee: main service struct
|
||||
*/
|
||||
void optee_disable_shm_cache(struct optee *optee)
|
||||
{
|
||||
struct optee_call_waiter w;
|
||||
|
||||
/* We need to retry until secure world isn't busy. */
|
||||
optee_cq_wait_init(&optee->call_queue, &w);
|
||||
while (true) {
|
||||
union {
|
||||
struct arm_smccc_res smccc;
|
||||
struct optee_smc_disable_shm_cache_result result;
|
||||
} res;
|
||||
|
||||
optee->invoke_fn(OPTEE_SMC_DISABLE_SHM_CACHE, 0, 0, 0, 0, 0, 0,
|
||||
0, &res.smccc);
|
||||
if (res.result.status == OPTEE_SMC_RETURN_ENOTAVAIL)
|
||||
break; /* All shm's freed */
|
||||
if (res.result.status == OPTEE_SMC_RETURN_OK) {
|
||||
struct tee_shm *shm;
|
||||
|
||||
shm = reg_pair_to_ptr(res.result.shm_upper32,
|
||||
res.result.shm_lower32);
|
||||
tee_shm_free(shm);
|
||||
} else {
|
||||
optee_cq_wait_for_completion(&optee->call_queue, &w);
|
||||
}
|
||||
}
|
||||
optee_cq_wait_final(&optee->call_queue, &w);
|
||||
}
|
||||
622
drivers/tee/optee/core.c
Normal file
622
drivers/tee/optee/core.c
Normal file
@ -0,0 +1,622 @@
|
||||
/*
|
||||
* Copyright (c) 2015, Linaro Limited
|
||||
*
|
||||
* This software is licensed under the terms of the GNU General Public
|
||||
* License version 2, as published by the Free Software Foundation, and
|
||||
* may be copied, distributed, and modified under those terms.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
*/
|
||||
|
||||
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
||||
|
||||
#include <linux/arm-smccc.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/of_platform.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/string.h>
|
||||
#include <linux/tee_drv.h>
|
||||
#include <linux/types.h>
|
||||
#include <linux/uaccess.h>
|
||||
#include "optee_private.h"
|
||||
#include "optee_smc.h"
|
||||
|
||||
#define DRIVER_NAME "optee"
|
||||
|
||||
#define OPTEE_SHM_NUM_PRIV_PAGES 1
|
||||
|
||||
/**
|
||||
* optee_from_msg_param() - convert from OPTEE_MSG parameters to
|
||||
* struct tee_param
|
||||
* @params: subsystem internal parameter representation
|
||||
* @num_params: number of elements in the parameter arrays
|
||||
* @msg_params: OPTEE_MSG parameters
|
||||
* Returns 0 on success or <0 on failure
|
||||
*/
|
||||
int optee_from_msg_param(struct tee_param *params, size_t num_params,
|
||||
const struct optee_msg_param *msg_params)
|
||||
{
|
||||
int rc;
|
||||
size_t n;
|
||||
struct tee_shm *shm;
|
||||
phys_addr_t pa;
|
||||
|
||||
for (n = 0; n < num_params; n++) {
|
||||
struct tee_param *p = params + n;
|
||||
const struct optee_msg_param *mp = msg_params + n;
|
||||
u32 attr = mp->attr & OPTEE_MSG_ATTR_TYPE_MASK;
|
||||
|
||||
switch (attr) {
|
||||
case OPTEE_MSG_ATTR_TYPE_NONE:
|
||||
p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE;
|
||||
memset(&p->u, 0, sizeof(p->u));
|
||||
break;
|
||||
case OPTEE_MSG_ATTR_TYPE_VALUE_INPUT:
|
||||
case OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT:
|
||||
case OPTEE_MSG_ATTR_TYPE_VALUE_INOUT:
|
||||
p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT +
|
||||
attr - OPTEE_MSG_ATTR_TYPE_VALUE_INPUT;
|
||||
p->u.value.a = mp->u.value.a;
|
||||
p->u.value.b = mp->u.value.b;
|
||||
p->u.value.c = mp->u.value.c;
|
||||
break;
|
||||
case OPTEE_MSG_ATTR_TYPE_TMEM_INPUT:
|
||||
case OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT:
|
||||
case OPTEE_MSG_ATTR_TYPE_TMEM_INOUT:
|
||||
p->attr = TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT +
|
||||
attr - OPTEE_MSG_ATTR_TYPE_TMEM_INPUT;
|
||||
p->u.memref.size = mp->u.tmem.size;
|
||||
shm = (struct tee_shm *)(unsigned long)
|
||||
mp->u.tmem.shm_ref;
|
||||
if (!shm) {
|
||||
p->u.memref.shm_offs = 0;
|
||||
p->u.memref.shm = NULL;
|
||||
break;
|
||||
}
|
||||
rc = tee_shm_get_pa(shm, 0, &pa);
|
||||
if (rc)
|
||||
return rc;
|
||||
p->u.memref.shm_offs = mp->u.tmem.buf_ptr - pa;
|
||||
p->u.memref.shm = shm;
|
||||
|
||||
/* Check that the memref is covered by the shm object */
|
||||
if (p->u.memref.size) {
|
||||
size_t o = p->u.memref.shm_offs +
|
||||
p->u.memref.size - 1;
|
||||
|
||||
rc = tee_shm_get_pa(shm, o, NULL);
|
||||
if (rc)
|
||||
return rc;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* optee_to_msg_param() - convert from struct tee_params to OPTEE_MSG parameters
|
||||
* @msg_params: OPTEE_MSG parameters
|
||||
* @num_params: number of elements in the parameter arrays
|
||||
* @params: subsystem itnernal parameter representation
|
||||
* Returns 0 on success or <0 on failure
|
||||
*/
|
||||
int optee_to_msg_param(struct optee_msg_param *msg_params, size_t num_params,
|
||||
const struct tee_param *params)
|
||||
{
|
||||
int rc;
|
||||
size_t n;
|
||||
phys_addr_t pa;
|
||||
|
||||
for (n = 0; n < num_params; n++) {
|
||||
const struct tee_param *p = params + n;
|
||||
struct optee_msg_param *mp = msg_params + n;
|
||||
|
||||
switch (p->attr) {
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_NONE:
|
||||
mp->attr = TEE_IOCTL_PARAM_ATTR_TYPE_NONE;
|
||||
memset(&mp->u, 0, sizeof(mp->u));
|
||||
break;
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT:
|
||||
mp->attr = OPTEE_MSG_ATTR_TYPE_VALUE_INPUT + p->attr -
|
||||
TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT;
|
||||
mp->u.value.a = p->u.value.a;
|
||||
mp->u.value.b = p->u.value.b;
|
||||
mp->u.value.c = p->u.value.c;
|
||||
break;
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
|
||||
mp->attr = OPTEE_MSG_ATTR_TYPE_TMEM_INPUT +
|
||||
p->attr -
|
||||
TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT;
|
||||
mp->u.tmem.shm_ref = (unsigned long)p->u.memref.shm;
|
||||
mp->u.tmem.size = p->u.memref.size;
|
||||
if (!p->u.memref.shm) {
|
||||
mp->u.tmem.buf_ptr = 0;
|
||||
break;
|
||||
}
|
||||
rc = tee_shm_get_pa(p->u.memref.shm,
|
||||
p->u.memref.shm_offs, &pa);
|
||||
if (rc)
|
||||
return rc;
|
||||
mp->u.tmem.buf_ptr = pa;
|
||||
mp->attr |= OPTEE_MSG_ATTR_CACHE_PREDEFINED <<
|
||||
OPTEE_MSG_ATTR_CACHE_SHIFT;
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void optee_get_version(struct tee_device *teedev,
|
||||
struct tee_ioctl_version_data *vers)
|
||||
{
|
||||
struct tee_ioctl_version_data v = {
|
||||
.impl_id = TEE_IMPL_ID_OPTEE,
|
||||
.impl_caps = TEE_OPTEE_CAP_TZ,
|
||||
.gen_caps = TEE_GEN_CAP_GP,
|
||||
};
|
||||
*vers = v;
|
||||
}
|
||||
|
||||
static int optee_open(struct tee_context *ctx)
|
||||
{
|
||||
struct optee_context_data *ctxdata;
|
||||
struct tee_device *teedev = ctx->teedev;
|
||||
struct optee *optee = tee_get_drvdata(teedev);
|
||||
|
||||
ctxdata = kzalloc(sizeof(*ctxdata), GFP_KERNEL);
|
||||
if (!ctxdata)
|
||||
return -ENOMEM;
|
||||
|
||||
if (teedev == optee->supp_teedev) {
|
||||
bool busy = true;
|
||||
|
||||
mutex_lock(&optee->supp.ctx_mutex);
|
||||
if (!optee->supp.ctx) {
|
||||
busy = false;
|
||||
optee->supp.ctx = ctx;
|
||||
}
|
||||
mutex_unlock(&optee->supp.ctx_mutex);
|
||||
if (busy) {
|
||||
kfree(ctxdata);
|
||||
return -EBUSY;
|
||||
}
|
||||
}
|
||||
|
||||
mutex_init(&ctxdata->mutex);
|
||||
INIT_LIST_HEAD(&ctxdata->sess_list);
|
||||
|
||||
ctx->data = ctxdata;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void optee_release(struct tee_context *ctx)
|
||||
{
|
||||
struct optee_context_data *ctxdata = ctx->data;
|
||||
struct tee_device *teedev = ctx->teedev;
|
||||
struct optee *optee = tee_get_drvdata(teedev);
|
||||
struct tee_shm *shm;
|
||||
struct optee_msg_arg *arg = NULL;
|
||||
phys_addr_t parg;
|
||||
struct optee_session *sess;
|
||||
struct optee_session *sess_tmp;
|
||||
|
||||
if (!ctxdata)
|
||||
return;
|
||||
|
||||
shm = tee_shm_alloc(ctx, sizeof(struct optee_msg_arg), TEE_SHM_MAPPED);
|
||||
if (!IS_ERR(shm)) {
|
||||
arg = tee_shm_get_va(shm, 0);
|
||||
/*
|
||||
* If va2pa fails for some reason, we can't call
|
||||
* optee_close_session(), only free the memory. Secure OS
|
||||
* will leak sessions and finally refuse more sessions, but
|
||||
* we will at least let normal world reclaim its memory.
|
||||
*/
|
||||
if (!IS_ERR(arg))
|
||||
tee_shm_va2pa(shm, arg, &parg);
|
||||
}
|
||||
|
||||
list_for_each_entry_safe(sess, sess_tmp, &ctxdata->sess_list,
|
||||
list_node) {
|
||||
list_del(&sess->list_node);
|
||||
if (!IS_ERR_OR_NULL(arg)) {
|
||||
memset(arg, 0, sizeof(*arg));
|
||||
arg->cmd = OPTEE_MSG_CMD_CLOSE_SESSION;
|
||||
arg->session = sess->session_id;
|
||||
optee_do_call_with_arg(ctx, parg);
|
||||
}
|
||||
kfree(sess);
|
||||
}
|
||||
kfree(ctxdata);
|
||||
|
||||
if (!IS_ERR(shm))
|
||||
tee_shm_free(shm);
|
||||
|
||||
ctx->data = NULL;
|
||||
|
||||
if (teedev == optee->supp_teedev) {
|
||||
mutex_lock(&optee->supp.ctx_mutex);
|
||||
optee->supp.ctx = NULL;
|
||||
mutex_unlock(&optee->supp.ctx_mutex);
|
||||
}
|
||||
}
|
||||
|
||||
static struct tee_driver_ops optee_ops = {
|
||||
.get_version = optee_get_version,
|
||||
.open = optee_open,
|
||||
.release = optee_release,
|
||||
.open_session = optee_open_session,
|
||||
.close_session = optee_close_session,
|
||||
.invoke_func = optee_invoke_func,
|
||||
.cancel_req = optee_cancel_req,
|
||||
};
|
||||
|
||||
static struct tee_desc optee_desc = {
|
||||
.name = DRIVER_NAME "-clnt",
|
||||
.ops = &optee_ops,
|
||||
.owner = THIS_MODULE,
|
||||
};
|
||||
|
||||
static struct tee_driver_ops optee_supp_ops = {
|
||||
.get_version = optee_get_version,
|
||||
.open = optee_open,
|
||||
.release = optee_release,
|
||||
.supp_recv = optee_supp_recv,
|
||||
.supp_send = optee_supp_send,
|
||||
};
|
||||
|
||||
static struct tee_desc optee_supp_desc = {
|
||||
.name = DRIVER_NAME "-supp",
|
||||
.ops = &optee_supp_ops,
|
||||
.owner = THIS_MODULE,
|
||||
.flags = TEE_DESC_PRIVILEGED,
|
||||
};
|
||||
|
||||
static bool optee_msg_api_uid_is_optee_api(optee_invoke_fn *invoke_fn)
|
||||
{
|
||||
struct arm_smccc_res res;
|
||||
|
||||
invoke_fn(OPTEE_SMC_CALLS_UID, 0, 0, 0, 0, 0, 0, 0, &res);
|
||||
|
||||
if (res.a0 == OPTEE_MSG_UID_0 && res.a1 == OPTEE_MSG_UID_1 &&
|
||||
res.a2 == OPTEE_MSG_UID_2 && res.a3 == OPTEE_MSG_UID_3)
|
||||
return true;
|
||||
return false;
|
||||
}
|
||||
|
||||
static bool optee_msg_api_revision_is_compatible(optee_invoke_fn *invoke_fn)
|
||||
{
|
||||
union {
|
||||
struct arm_smccc_res smccc;
|
||||
struct optee_smc_calls_revision_result result;
|
||||
} res;
|
||||
|
||||
invoke_fn(OPTEE_SMC_CALLS_REVISION, 0, 0, 0, 0, 0, 0, 0, &res.smccc);
|
||||
|
||||
if (res.result.major == OPTEE_MSG_REVISION_MAJOR &&
|
||||
(int)res.result.minor >= OPTEE_MSG_REVISION_MINOR)
|
||||
return true;
|
||||
return false;
|
||||
}
|
||||
|
||||
static bool optee_msg_exchange_capabilities(optee_invoke_fn *invoke_fn,
|
||||
u32 *sec_caps)
|
||||
{
|
||||
union {
|
||||
struct arm_smccc_res smccc;
|
||||
struct optee_smc_exchange_capabilities_result result;
|
||||
} res;
|
||||
u32 a1 = 0;
|
||||
|
||||
/*
|
||||
* TODO This isn't enough to tell if it's UP system (from kernel
|
||||
* point of view) or not, is_smp() returns the the information
|
||||
* needed, but can't be called directly from here.
|
||||
*/
|
||||
if (!IS_ENABLED(CONFIG_SMP) || nr_cpu_ids == 1)
|
||||
a1 |= OPTEE_SMC_NSEC_CAP_UNIPROCESSOR;
|
||||
|
||||
invoke_fn(OPTEE_SMC_EXCHANGE_CAPABILITIES, a1, 0, 0, 0, 0, 0, 0,
|
||||
&res.smccc);
|
||||
|
||||
if (res.result.status != OPTEE_SMC_RETURN_OK)
|
||||
return false;
|
||||
|
||||
*sec_caps = res.result.capabilities;
|
||||
return true;
|
||||
}
|
||||
|
||||
static struct tee_shm_pool *
|
||||
optee_config_shm_memremap(optee_invoke_fn *invoke_fn, void **memremaped_shm)
|
||||
{
|
||||
union {
|
||||
struct arm_smccc_res smccc;
|
||||
struct optee_smc_get_shm_config_result result;
|
||||
} res;
|
||||
struct tee_shm_pool *pool;
|
||||
unsigned long vaddr;
|
||||
phys_addr_t paddr;
|
||||
size_t size;
|
||||
phys_addr_t begin;
|
||||
phys_addr_t end;
|
||||
void *va;
|
||||
struct tee_shm_pool_mem_info priv_info;
|
||||
struct tee_shm_pool_mem_info dmabuf_info;
|
||||
|
||||
invoke_fn(OPTEE_SMC_GET_SHM_CONFIG, 0, 0, 0, 0, 0, 0, 0, &res.smccc);
|
||||
if (res.result.status != OPTEE_SMC_RETURN_OK) {
|
||||
pr_info("shm service not available\n");
|
||||
return ERR_PTR(-ENOENT);
|
||||
}
|
||||
|
||||
if (res.result.settings != OPTEE_SMC_SHM_CACHED) {
|
||||
pr_err("only normal cached shared memory supported\n");
|
||||
return ERR_PTR(-EINVAL);
|
||||
}
|
||||
|
||||
begin = roundup(res.result.start, PAGE_SIZE);
|
||||
end = rounddown(res.result.start + res.result.size, PAGE_SIZE);
|
||||
paddr = begin;
|
||||
size = end - begin;
|
||||
|
||||
if (size < 2 * OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE) {
|
||||
pr_err("too small shared memory area\n");
|
||||
return ERR_PTR(-EINVAL);
|
||||
}
|
||||
|
||||
va = memremap(paddr, size, MEMREMAP_WB);
|
||||
if (!va) {
|
||||
pr_err("shared memory ioremap failed\n");
|
||||
return ERR_PTR(-EINVAL);
|
||||
}
|
||||
vaddr = (unsigned long)va;
|
||||
|
||||
priv_info.vaddr = vaddr;
|
||||
priv_info.paddr = paddr;
|
||||
priv_info.size = OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE;
|
||||
dmabuf_info.vaddr = vaddr + OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE;
|
||||
dmabuf_info.paddr = paddr + OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE;
|
||||
dmabuf_info.size = size - OPTEE_SHM_NUM_PRIV_PAGES * PAGE_SIZE;
|
||||
|
||||
pool = tee_shm_pool_alloc_res_mem(&priv_info, &dmabuf_info);
|
||||
if (IS_ERR(pool)) {
|
||||
memunmap(va);
|
||||
goto out;
|
||||
}
|
||||
|
||||
*memremaped_shm = va;
|
||||
out:
|
||||
return pool;
|
||||
}
|
||||
|
||||
/* Simple wrapper functions to be able to use a function pointer */
|
||||
static void optee_smccc_smc(unsigned long a0, unsigned long a1,
|
||||
unsigned long a2, unsigned long a3,
|
||||
unsigned long a4, unsigned long a5,
|
||||
unsigned long a6, unsigned long a7,
|
||||
struct arm_smccc_res *res)
|
||||
{
|
||||
arm_smccc_smc(a0, a1, a2, a3, a4, a5, a6, a7, res);
|
||||
}
|
||||
|
||||
static void optee_smccc_hvc(unsigned long a0, unsigned long a1,
|
||||
unsigned long a2, unsigned long a3,
|
||||
unsigned long a4, unsigned long a5,
|
||||
unsigned long a6, unsigned long a7,
|
||||
struct arm_smccc_res *res)
|
||||
{
|
||||
arm_smccc_hvc(a0, a1, a2, a3, a4, a5, a6, a7, res);
|
||||
}
|
||||
|
||||
static optee_invoke_fn *get_invoke_func(struct device_node *np)
|
||||
{
|
||||
const char *method;
|
||||
|
||||
pr_info("probing for conduit method from DT.\n");
|
||||
|
||||
if (of_property_read_string(np, "method", &method)) {
|
||||
pr_warn("missing \"method\" property\n");
|
||||
return ERR_PTR(-ENXIO);
|
||||
}
|
||||
|
||||
if (!strcmp("hvc", method))
|
||||
return optee_smccc_hvc;
|
||||
else if (!strcmp("smc", method))
|
||||
return optee_smccc_smc;
|
||||
|
||||
pr_warn("invalid \"method\" property: %s\n", method);
|
||||
return ERR_PTR(-EINVAL);
|
||||
}
|
||||
|
||||
static struct optee *optee_probe(struct device_node *np)
|
||||
{
|
||||
optee_invoke_fn *invoke_fn;
|
||||
struct tee_shm_pool *pool;
|
||||
struct optee *optee = NULL;
|
||||
void *memremaped_shm = NULL;
|
||||
struct tee_device *teedev;
|
||||
u32 sec_caps;
|
||||
int rc;
|
||||
|
||||
invoke_fn = get_invoke_func(np);
|
||||
if (IS_ERR(invoke_fn))
|
||||
return (void *)invoke_fn;
|
||||
|
||||
if (!optee_msg_api_uid_is_optee_api(invoke_fn)) {
|
||||
pr_warn("api uid mismatch\n");
|
||||
return ERR_PTR(-EINVAL);
|
||||
}
|
||||
|
||||
if (!optee_msg_api_revision_is_compatible(invoke_fn)) {
|
||||
pr_warn("api revision mismatch\n");
|
||||
return ERR_PTR(-EINVAL);
|
||||
}
|
||||
|
||||
if (!optee_msg_exchange_capabilities(invoke_fn, &sec_caps)) {
|
||||
pr_warn("capabilities mismatch\n");
|
||||
return ERR_PTR(-EINVAL);
|
||||
}
|
||||
|
||||
/*
|
||||
* We have no other option for shared memory, if secure world
|
||||
* doesn't have any reserved memory we can use we can't continue.
|
||||
*/
|
||||
if (!(sec_caps & OPTEE_SMC_SEC_CAP_HAVE_RESERVED_SHM))
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
pool = optee_config_shm_memremap(invoke_fn, &memremaped_shm);
|
||||
if (IS_ERR(pool))
|
||||
return (void *)pool;
|
||||
|
||||
optee = kzalloc(sizeof(*optee), GFP_KERNEL);
|
||||
if (!optee) {
|
||||
rc = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
|
||||
optee->invoke_fn = invoke_fn;
|
||||
|
||||
teedev = tee_device_alloc(&optee_desc, NULL, pool, optee);
|
||||
if (IS_ERR(teedev)) {
|
||||
rc = PTR_ERR(teedev);
|
||||
goto err;
|
||||
}
|
||||
optee->teedev = teedev;
|
||||
|
||||
teedev = tee_device_alloc(&optee_supp_desc, NULL, pool, optee);
|
||||
if (IS_ERR(teedev)) {
|
||||
rc = PTR_ERR(teedev);
|
||||
goto err;
|
||||
}
|
||||
optee->supp_teedev = teedev;
|
||||
|
||||
rc = tee_device_register(optee->teedev);
|
||||
if (rc)
|
||||
goto err;
|
||||
|
||||
rc = tee_device_register(optee->supp_teedev);
|
||||
if (rc)
|
||||
goto err;
|
||||
|
||||
mutex_init(&optee->call_queue.mutex);
|
||||
INIT_LIST_HEAD(&optee->call_queue.waiters);
|
||||
optee_wait_queue_init(&optee->wait_queue);
|
||||
optee_supp_init(&optee->supp);
|
||||
optee->memremaped_shm = memremaped_shm;
|
||||
optee->pool = pool;
|
||||
|
||||
optee_enable_shm_cache(optee);
|
||||
|
||||
pr_info("initialized driver\n");
|
||||
return optee;
|
||||
err:
|
||||
if (optee) {
|
||||
/*
|
||||
* tee_device_unregister() is safe to call even if the
|
||||
* devices hasn't been registered with
|
||||
* tee_device_register() yet.
|
||||
*/
|
||||
tee_device_unregister(optee->supp_teedev);
|
||||
tee_device_unregister(optee->teedev);
|
||||
kfree(optee);
|
||||
}
|
||||
if (pool)
|
||||
tee_shm_pool_free(pool);
|
||||
if (memremaped_shm)
|
||||
memunmap(memremaped_shm);
|
||||
return ERR_PTR(rc);
|
||||
}
|
||||
|
||||
static void optee_remove(struct optee *optee)
|
||||
{
|
||||
/*
|
||||
* Ask OP-TEE to free all cached shared memory objects to decrease
|
||||
* reference counters and also avoid wild pointers in secure world
|
||||
* into the old shared memory range.
|
||||
*/
|
||||
optee_disable_shm_cache(optee);
|
||||
|
||||
/*
|
||||
* The two devices has to be unregistered before we can free the
|
||||
* other resources.
|
||||
*/
|
||||
tee_device_unregister(optee->supp_teedev);
|
||||
tee_device_unregister(optee->teedev);
|
||||
|
||||
tee_shm_pool_free(optee->pool);
|
||||
if (optee->memremaped_shm)
|
||||
memunmap(optee->memremaped_shm);
|
||||
optee_wait_queue_exit(&optee->wait_queue);
|
||||
optee_supp_uninit(&optee->supp);
|
||||
mutex_destroy(&optee->call_queue.mutex);
|
||||
|
||||
kfree(optee);
|
||||
}
|
||||
|
||||
static const struct of_device_id optee_match[] = {
|
||||
{ .compatible = "linaro,optee-tz" },
|
||||
{},
|
||||
};
|
||||
|
||||
static struct optee *optee_svc;
|
||||
|
||||
static int __init optee_driver_init(void)
|
||||
{
|
||||
struct device_node *fw_np;
|
||||
struct device_node *np;
|
||||
struct optee *optee;
|
||||
|
||||
/* Node is supposed to be below /firmware */
|
||||
fw_np = of_find_node_by_name(NULL, "firmware");
|
||||
if (!fw_np)
|
||||
return -ENODEV;
|
||||
|
||||
np = of_find_matching_node(fw_np, optee_match);
|
||||
of_node_put(fw_np);
|
||||
if (!np)
|
||||
return -ENODEV;
|
||||
|
||||
optee = optee_probe(np);
|
||||
of_node_put(np);
|
||||
|
||||
if (IS_ERR(optee))
|
||||
return PTR_ERR(optee);
|
||||
|
||||
optee_svc = optee;
|
||||
|
||||
return 0;
|
||||
}
|
||||
module_init(optee_driver_init);
|
||||
|
||||
static void __exit optee_driver_exit(void)
|
||||
{
|
||||
struct optee *optee = optee_svc;
|
||||
|
||||
optee_svc = NULL;
|
||||
if (optee)
|
||||
optee_remove(optee);
|
||||
}
|
||||
module_exit(optee_driver_exit);
|
||||
|
||||
MODULE_AUTHOR("Linaro");
|
||||
MODULE_DESCRIPTION("OP-TEE driver");
|
||||
MODULE_SUPPORTED_DEVICE("");
|
||||
MODULE_VERSION("1.0");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
418
drivers/tee/optee/optee_msg.h
Normal file
418
drivers/tee/optee/optee_msg.h
Normal file
@ -0,0 +1,418 @@
|
||||
/*
|
||||
* Copyright (c) 2015-2016, Linaro Limited
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
||||
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
#ifndef _OPTEE_MSG_H
|
||||
#define _OPTEE_MSG_H
|
||||
|
||||
#include <linux/bitops.h>
|
||||
#include <linux/types.h>
|
||||
|
||||
/*
|
||||
* This file defines the OP-TEE message protocol used to communicate
|
||||
* with an instance of OP-TEE running in secure world.
|
||||
*
|
||||
* This file is divided into three sections.
|
||||
* 1. Formatting of messages.
|
||||
* 2. Requests from normal world
|
||||
* 3. Requests from secure world, Remote Procedure Call (RPC), handled by
|
||||
* tee-supplicant.
|
||||
*/
|
||||
|
||||
/*****************************************************************************
|
||||
* Part 1 - formatting of messages
|
||||
*****************************************************************************/
|
||||
|
||||
#define OPTEE_MSG_ATTR_TYPE_NONE 0x0
|
||||
#define OPTEE_MSG_ATTR_TYPE_VALUE_INPUT 0x1
|
||||
#define OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT 0x2
|
||||
#define OPTEE_MSG_ATTR_TYPE_VALUE_INOUT 0x3
|
||||
#define OPTEE_MSG_ATTR_TYPE_RMEM_INPUT 0x5
|
||||
#define OPTEE_MSG_ATTR_TYPE_RMEM_OUTPUT 0x6
|
||||
#define OPTEE_MSG_ATTR_TYPE_RMEM_INOUT 0x7
|
||||
#define OPTEE_MSG_ATTR_TYPE_TMEM_INPUT 0x9
|
||||
#define OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT 0xa
|
||||
#define OPTEE_MSG_ATTR_TYPE_TMEM_INOUT 0xb
|
||||
|
||||
#define OPTEE_MSG_ATTR_TYPE_MASK GENMASK(7, 0)
|
||||
|
||||
/*
|
||||
* Meta parameter to be absorbed by the Secure OS and not passed
|
||||
* to the Trusted Application.
|
||||
*
|
||||
* Currently only used with OPTEE_MSG_CMD_OPEN_SESSION.
|
||||
*/
|
||||
#define OPTEE_MSG_ATTR_META BIT(8)
|
||||
|
||||
/*
|
||||
* The temporary shared memory object is not physically contigous and this
|
||||
* temp memref is followed by another fragment until the last temp memref
|
||||
* that doesn't have this bit set.
|
||||
*/
|
||||
#define OPTEE_MSG_ATTR_FRAGMENT BIT(9)
|
||||
|
||||
/*
|
||||
* Memory attributes for caching passed with temp memrefs. The actual value
|
||||
* used is defined outside the message protocol with the exception of
|
||||
* OPTEE_MSG_ATTR_CACHE_PREDEFINED which means the attributes already
|
||||
* defined for the memory range should be used. If optee_smc.h is used as
|
||||
* bearer of this protocol OPTEE_SMC_SHM_* is used for values.
|
||||
*/
|
||||
#define OPTEE_MSG_ATTR_CACHE_SHIFT 16
|
||||
#define OPTEE_MSG_ATTR_CACHE_MASK GENMASK(2, 0)
|
||||
#define OPTEE_MSG_ATTR_CACHE_PREDEFINED 0
|
||||
|
||||
/*
|
||||
* Same values as TEE_LOGIN_* from TEE Internal API
|
||||
*/
|
||||
#define OPTEE_MSG_LOGIN_PUBLIC 0x00000000
|
||||
#define OPTEE_MSG_LOGIN_USER 0x00000001
|
||||
#define OPTEE_MSG_LOGIN_GROUP 0x00000002
|
||||
#define OPTEE_MSG_LOGIN_APPLICATION 0x00000004
|
||||
#define OPTEE_MSG_LOGIN_APPLICATION_USER 0x00000005
|
||||
#define OPTEE_MSG_LOGIN_APPLICATION_GROUP 0x00000006
|
||||
|
||||
/**
|
||||
* struct optee_msg_param_tmem - temporary memory reference parameter
|
||||
* @buf_ptr: Address of the buffer
|
||||
* @size: Size of the buffer
|
||||
* @shm_ref: Temporary shared memory reference, pointer to a struct tee_shm
|
||||
*
|
||||
* Secure and normal world communicates pointers as physical address
|
||||
* instead of the virtual address. This is because secure and normal world
|
||||
* have completely independent memory mapping. Normal world can even have a
|
||||
* hypervisor which need to translate the guest physical address (AKA IPA
|
||||
* in ARM documentation) to a real physical address before passing the
|
||||
* structure to secure world.
|
||||
*/
|
||||
struct optee_msg_param_tmem {
|
||||
u64 buf_ptr;
|
||||
u64 size;
|
||||
u64 shm_ref;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct optee_msg_param_rmem - registered memory reference parameter
|
||||
* @offs: Offset into shared memory reference
|
||||
* @size: Size of the buffer
|
||||
* @shm_ref: Shared memory reference, pointer to a struct tee_shm
|
||||
*/
|
||||
struct optee_msg_param_rmem {
|
||||
u64 offs;
|
||||
u64 size;
|
||||
u64 shm_ref;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct optee_msg_param_value - opaque value parameter
|
||||
*
|
||||
* Value parameters are passed unchecked between normal and secure world.
|
||||
*/
|
||||
struct optee_msg_param_value {
|
||||
u64 a;
|
||||
u64 b;
|
||||
u64 c;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct optee_msg_param - parameter used together with struct optee_msg_arg
|
||||
* @attr: attributes
|
||||
* @tmem: parameter by temporary memory reference
|
||||
* @rmem: parameter by registered memory reference
|
||||
* @value: parameter by opaque value
|
||||
*
|
||||
* @attr & OPTEE_MSG_ATTR_TYPE_MASK indicates if tmem, rmem or value is used in
|
||||
* the union. OPTEE_MSG_ATTR_TYPE_VALUE_* indicates value,
|
||||
* OPTEE_MSG_ATTR_TYPE_TMEM_* indicates tmem and
|
||||
* OPTEE_MSG_ATTR_TYPE_RMEM_* indicates rmem.
|
||||
* OPTEE_MSG_ATTR_TYPE_NONE indicates that none of the members are used.
|
||||
*/
|
||||
struct optee_msg_param {
|
||||
u64 attr;
|
||||
union {
|
||||
struct optee_msg_param_tmem tmem;
|
||||
struct optee_msg_param_rmem rmem;
|
||||
struct optee_msg_param_value value;
|
||||
} u;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct optee_msg_arg - call argument
|
||||
* @cmd: Command, one of OPTEE_MSG_CMD_* or OPTEE_MSG_RPC_CMD_*
|
||||
* @func: Trusted Application function, specific to the Trusted Application,
|
||||
* used if cmd == OPTEE_MSG_CMD_INVOKE_COMMAND
|
||||
* @session: In parameter for all OPTEE_MSG_CMD_* except
|
||||
* OPTEE_MSG_CMD_OPEN_SESSION where it's an output parameter instead
|
||||
* @cancel_id: Cancellation id, a unique value to identify this request
|
||||
* @ret: return value
|
||||
* @ret_origin: origin of the return value
|
||||
* @num_params: number of parameters supplied to the OS Command
|
||||
* @params: the parameters supplied to the OS Command
|
||||
*
|
||||
* All normal calls to Trusted OS uses this struct. If cmd requires further
|
||||
* information than what these field holds it can be passed as a parameter
|
||||
* tagged as meta (setting the OPTEE_MSG_ATTR_META bit in corresponding
|
||||
* attrs field). All parameters tagged as meta has to come first.
|
||||
*
|
||||
* Temp memref parameters can be fragmented if supported by the Trusted OS
|
||||
* (when optee_smc.h is bearer of this protocol this is indicated with
|
||||
* OPTEE_SMC_SEC_CAP_UNREGISTERED_SHM). If a logical memref parameter is
|
||||
* fragmented then has all but the last fragment the
|
||||
* OPTEE_MSG_ATTR_FRAGMENT bit set in attrs. Even if a memref is fragmented
|
||||
* it will still be presented as a single logical memref to the Trusted
|
||||
* Application.
|
||||
*/
|
||||
struct optee_msg_arg {
|
||||
u32 cmd;
|
||||
u32 func;
|
||||
u32 session;
|
||||
u32 cancel_id;
|
||||
u32 pad;
|
||||
u32 ret;
|
||||
u32 ret_origin;
|
||||
u32 num_params;
|
||||
|
||||
/* num_params tells the actual number of element in params */
|
||||
struct optee_msg_param params[0];
|
||||
};
|
||||
|
||||
/**
|
||||
* OPTEE_MSG_GET_ARG_SIZE - return size of struct optee_msg_arg
|
||||
*
|
||||
* @num_params: Number of parameters embedded in the struct optee_msg_arg
|
||||
*
|
||||
* Returns the size of the struct optee_msg_arg together with the number
|
||||
* of embedded parameters.
|
||||
*/
|
||||
#define OPTEE_MSG_GET_ARG_SIZE(num_params) \
|
||||
(sizeof(struct optee_msg_arg) + \
|
||||
sizeof(struct optee_msg_param) * (num_params))
|
||||
|
||||
/*****************************************************************************
|
||||
* Part 2 - requests from normal world
|
||||
*****************************************************************************/
|
||||
|
||||
/*
|
||||
* Return the following UID if using API specified in this file without
|
||||
* further extensions:
|
||||
* 384fb3e0-e7f8-11e3-af63-0002a5d5c51b.
|
||||
* Represented in 4 32-bit words in OPTEE_MSG_UID_0, OPTEE_MSG_UID_1,
|
||||
* OPTEE_MSG_UID_2, OPTEE_MSG_UID_3.
|
||||
*/
|
||||
#define OPTEE_MSG_UID_0 0x384fb3e0
|
||||
#define OPTEE_MSG_UID_1 0xe7f811e3
|
||||
#define OPTEE_MSG_UID_2 0xaf630002
|
||||
#define OPTEE_MSG_UID_3 0xa5d5c51b
|
||||
#define OPTEE_MSG_FUNCID_CALLS_UID 0xFF01
|
||||
|
||||
/*
|
||||
* Returns 2.0 if using API specified in this file without further
|
||||
* extensions. Represented in 2 32-bit words in OPTEE_MSG_REVISION_MAJOR
|
||||
* and OPTEE_MSG_REVISION_MINOR
|
||||
*/
|
||||
#define OPTEE_MSG_REVISION_MAJOR 2
|
||||
#define OPTEE_MSG_REVISION_MINOR 0
|
||||
#define OPTEE_MSG_FUNCID_CALLS_REVISION 0xFF03
|
||||
|
||||
/*
|
||||
* Get UUID of Trusted OS.
|
||||
*
|
||||
* Used by non-secure world to figure out which Trusted OS is installed.
|
||||
* Note that returned UUID is the UUID of the Trusted OS, not of the API.
|
||||
*
|
||||
* Returns UUID in 4 32-bit words in the same way as
|
||||
* OPTEE_MSG_FUNCID_CALLS_UID described above.
|
||||
*/
|
||||
#define OPTEE_MSG_OS_OPTEE_UUID_0 0x486178e0
|
||||
#define OPTEE_MSG_OS_OPTEE_UUID_1 0xe7f811e3
|
||||
#define OPTEE_MSG_OS_OPTEE_UUID_2 0xbc5e0002
|
||||
#define OPTEE_MSG_OS_OPTEE_UUID_3 0xa5d5c51b
|
||||
#define OPTEE_MSG_FUNCID_GET_OS_UUID 0x0000
|
||||
|
||||
/*
|
||||
* Get revision of Trusted OS.
|
||||
*
|
||||
* Used by non-secure world to figure out which version of the Trusted OS
|
||||
* is installed. Note that the returned revision is the revision of the
|
||||
* Trusted OS, not of the API.
|
||||
*
|
||||
* Returns revision in 2 32-bit words in the same way as
|
||||
* OPTEE_MSG_CALLS_REVISION described above.
|
||||
*/
|
||||
#define OPTEE_MSG_FUNCID_GET_OS_REVISION 0x0001
|
||||
|
||||
/*
|
||||
* Do a secure call with struct optee_msg_arg as argument
|
||||
* The OPTEE_MSG_CMD_* below defines what goes in struct optee_msg_arg::cmd
|
||||
*
|
||||
* OPTEE_MSG_CMD_OPEN_SESSION opens a session to a Trusted Application.
|
||||
* The first two parameters are tagged as meta, holding two value
|
||||
* parameters to pass the following information:
|
||||
* param[0].u.value.a-b uuid of Trusted Application
|
||||
* param[1].u.value.a-b uuid of Client
|
||||
* param[1].u.value.c Login class of client OPTEE_MSG_LOGIN_*
|
||||
*
|
||||
* OPTEE_MSG_CMD_INVOKE_COMMAND invokes a command a previously opened
|
||||
* session to a Trusted Application. struct optee_msg_arg::func is Trusted
|
||||
* Application function, specific to the Trusted Application.
|
||||
*
|
||||
* OPTEE_MSG_CMD_CLOSE_SESSION closes a previously opened session to
|
||||
* Trusted Application.
|
||||
*
|
||||
* OPTEE_MSG_CMD_CANCEL cancels a currently invoked command.
|
||||
*
|
||||
* OPTEE_MSG_CMD_REGISTER_SHM registers a shared memory reference. The
|
||||
* information is passed as:
|
||||
* [in] param[0].attr OPTEE_MSG_ATTR_TYPE_TMEM_INPUT
|
||||
* [| OPTEE_MSG_ATTR_FRAGMENT]
|
||||
* [in] param[0].u.tmem.buf_ptr physical address (of first fragment)
|
||||
* [in] param[0].u.tmem.size size (of first fragment)
|
||||
* [in] param[0].u.tmem.shm_ref holds shared memory reference
|
||||
* ...
|
||||
* The shared memory can optionally be fragmented, temp memrefs can follow
|
||||
* each other with all but the last with the OPTEE_MSG_ATTR_FRAGMENT bit set.
|
||||
*
|
||||
* OPTEE_MSG_CMD_UNREGISTER_SHM unregisteres a previously registered shared
|
||||
* memory reference. The information is passed as:
|
||||
* [in] param[0].attr OPTEE_MSG_ATTR_TYPE_RMEM_INPUT
|
||||
* [in] param[0].u.rmem.shm_ref holds shared memory reference
|
||||
* [in] param[0].u.rmem.offs 0
|
||||
* [in] param[0].u.rmem.size 0
|
||||
*/
|
||||
#define OPTEE_MSG_CMD_OPEN_SESSION 0
|
||||
#define OPTEE_MSG_CMD_INVOKE_COMMAND 1
|
||||
#define OPTEE_MSG_CMD_CLOSE_SESSION 2
|
||||
#define OPTEE_MSG_CMD_CANCEL 3
|
||||
#define OPTEE_MSG_CMD_REGISTER_SHM 4
|
||||
#define OPTEE_MSG_CMD_UNREGISTER_SHM 5
|
||||
#define OPTEE_MSG_FUNCID_CALL_WITH_ARG 0x0004
|
||||
|
||||
/*****************************************************************************
|
||||
* Part 3 - Requests from secure world, RPC
|
||||
*****************************************************************************/
|
||||
|
||||
/*
|
||||
* All RPC is done with a struct optee_msg_arg as bearer of information,
|
||||
* struct optee_msg_arg::arg holds values defined by OPTEE_MSG_RPC_CMD_* below
|
||||
*
|
||||
* RPC communication with tee-supplicant is reversed compared to normal
|
||||
* client communication desribed above. The supplicant receives requests
|
||||
* and sends responses.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Load a TA into memory, defined in tee-supplicant
|
||||
*/
|
||||
#define OPTEE_MSG_RPC_CMD_LOAD_TA 0
|
||||
|
||||
/*
|
||||
* Reserved
|
||||
*/
|
||||
#define OPTEE_MSG_RPC_CMD_RPMB 1
|
||||
|
||||
/*
|
||||
* File system access, defined in tee-supplicant
|
||||
*/
|
||||
#define OPTEE_MSG_RPC_CMD_FS 2
|
||||
|
||||
/*
|
||||
* Get time
|
||||
*
|
||||
* Returns number of seconds and nano seconds since the Epoch,
|
||||
* 1970-01-01 00:00:00 +0000 (UTC).
|
||||
*
|
||||
* [out] param[0].u.value.a Number of seconds
|
||||
* [out] param[0].u.value.b Number of nano seconds.
|
||||
*/
|
||||
#define OPTEE_MSG_RPC_CMD_GET_TIME 3
|
||||
|
||||
/*
|
||||
* Wait queue primitive, helper for secure world to implement a wait queue.
|
||||
*
|
||||
* If secure world need to wait for a secure world mutex it issues a sleep
|
||||
* request instead of spinning in secure world. Conversely is a wakeup
|
||||
* request issued when a secure world mutex with a thread waiting thread is
|
||||
* unlocked.
|
||||
*
|
||||
* Waiting on a key
|
||||
* [in] param[0].u.value.a OPTEE_MSG_RPC_WAIT_QUEUE_SLEEP
|
||||
* [in] param[0].u.value.b wait key
|
||||
*
|
||||
* Waking up a key
|
||||
* [in] param[0].u.value.a OPTEE_MSG_RPC_WAIT_QUEUE_WAKEUP
|
||||
* [in] param[0].u.value.b wakeup key
|
||||
*/
|
||||
#define OPTEE_MSG_RPC_CMD_WAIT_QUEUE 4
|
||||
#define OPTEE_MSG_RPC_WAIT_QUEUE_SLEEP 0
|
||||
#define OPTEE_MSG_RPC_WAIT_QUEUE_WAKEUP 1
|
||||
|
||||
/*
|
||||
* Suspend execution
|
||||
*
|
||||
* [in] param[0].value .a number of milliseconds to suspend
|
||||
*/
|
||||
#define OPTEE_MSG_RPC_CMD_SUSPEND 5
|
||||
|
||||
/*
|
||||
* Allocate a piece of shared memory
|
||||
*
|
||||
* Shared memory can optionally be fragmented, to support that additional
|
||||
* spare param entries are allocated to make room for eventual fragments.
|
||||
* The spare param entries has .attr = OPTEE_MSG_ATTR_TYPE_NONE when
|
||||
* unused. All returned temp memrefs except the last should have the
|
||||
* OPTEE_MSG_ATTR_FRAGMENT bit set in the attr field.
|
||||
*
|
||||
* [in] param[0].u.value.a type of memory one of
|
||||
* OPTEE_MSG_RPC_SHM_TYPE_* below
|
||||
* [in] param[0].u.value.b requested size
|
||||
* [in] param[0].u.value.c required alignment
|
||||
*
|
||||
* [out] param[0].u.tmem.buf_ptr physical address (of first fragment)
|
||||
* [out] param[0].u.tmem.size size (of first fragment)
|
||||
* [out] param[0].u.tmem.shm_ref shared memory reference
|
||||
* ...
|
||||
* [out] param[n].u.tmem.buf_ptr physical address
|
||||
* [out] param[n].u.tmem.size size
|
||||
* [out] param[n].u.tmem.shm_ref shared memory reference (same value
|
||||
* as in param[n-1].u.tmem.shm_ref)
|
||||
*/
|
||||
#define OPTEE_MSG_RPC_CMD_SHM_ALLOC 6
|
||||
/* Memory that can be shared with a non-secure user space application */
|
||||
#define OPTEE_MSG_RPC_SHM_TYPE_APPL 0
|
||||
/* Memory only shared with non-secure kernel */
|
||||
#define OPTEE_MSG_RPC_SHM_TYPE_KERNEL 1
|
||||
|
||||
/*
|
||||
* Free shared memory previously allocated with OPTEE_MSG_RPC_CMD_SHM_ALLOC
|
||||
*
|
||||
* [in] param[0].u.value.a type of memory one of
|
||||
* OPTEE_MSG_RPC_SHM_TYPE_* above
|
||||
* [in] param[0].u.value.b value of shared memory reference
|
||||
* returned in param[0].u.tmem.shm_ref
|
||||
* above
|
||||
*/
|
||||
#define OPTEE_MSG_RPC_CMD_SHM_FREE 7
|
||||
|
||||
#endif /* _OPTEE_MSG_H */
|
||||
183
drivers/tee/optee/optee_private.h
Normal file
183
drivers/tee/optee/optee_private.h
Normal file
@ -0,0 +1,183 @@
|
||||
/*
|
||||
* Copyright (c) 2015, Linaro Limited
|
||||
*
|
||||
* This software is licensed under the terms of the GNU General Public
|
||||
* License version 2, as published by the Free Software Foundation, and
|
||||
* may be copied, distributed, and modified under those terms.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef OPTEE_PRIVATE_H
|
||||
#define OPTEE_PRIVATE_H
|
||||
|
||||
#include <linux/arm-smccc.h>
|
||||
#include <linux/semaphore.h>
|
||||
#include <linux/tee_drv.h>
|
||||
#include <linux/types.h>
|
||||
#include "optee_msg.h"
|
||||
|
||||
#define OPTEE_MAX_ARG_SIZE 1024
|
||||
|
||||
/* Some Global Platform error codes used in this driver */
|
||||
#define TEEC_SUCCESS 0x00000000
|
||||
#define TEEC_ERROR_BAD_PARAMETERS 0xFFFF0006
|
||||
#define TEEC_ERROR_COMMUNICATION 0xFFFF000E
|
||||
#define TEEC_ERROR_OUT_OF_MEMORY 0xFFFF000C
|
||||
|
||||
#define TEEC_ORIGIN_COMMS 0x00000002
|
||||
|
||||
typedef void (optee_invoke_fn)(unsigned long, unsigned long, unsigned long,
|
||||
unsigned long, unsigned long, unsigned long,
|
||||
unsigned long, unsigned long,
|
||||
struct arm_smccc_res *);
|
||||
|
||||
struct optee_call_queue {
|
||||
/* Serializes access to this struct */
|
||||
struct mutex mutex;
|
||||
struct list_head waiters;
|
||||
};
|
||||
|
||||
struct optee_wait_queue {
|
||||
/* Serializes access to this struct */
|
||||
struct mutex mu;
|
||||
struct list_head db;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct optee_supp - supplicant synchronization struct
|
||||
* @ctx the context of current connected supplicant.
|
||||
* if !NULL the supplicant device is available for use,
|
||||
* else busy
|
||||
* @ctx_mutex: held while accessing @ctx
|
||||
* @func: supplicant function id to call
|
||||
* @ret: call return value
|
||||
* @num_params: number of elements in @param
|
||||
* @param: parameters for @func
|
||||
* @req_posted: if true, a request has been posted to the supplicant
|
||||
* @supp_next_send: if true, next step is for supplicant to send response
|
||||
* @thrd_mutex: held by the thread doing a request to supplicant
|
||||
* @supp_mutex: held by supplicant while operating on this struct
|
||||
* @data_to_supp: supplicant is waiting on this for next request
|
||||
* @data_from_supp: requesting thread is waiting on this to get the result
|
||||
*/
|
||||
struct optee_supp {
|
||||
struct tee_context *ctx;
|
||||
/* Serializes access of ctx */
|
||||
struct mutex ctx_mutex;
|
||||
|
||||
u32 func;
|
||||
u32 ret;
|
||||
size_t num_params;
|
||||
struct tee_param *param;
|
||||
|
||||
bool req_posted;
|
||||
bool supp_next_send;
|
||||
/* Serializes access to this struct for requesting thread */
|
||||
struct mutex thrd_mutex;
|
||||
/* Serializes access to this struct for supplicant threads */
|
||||
struct mutex supp_mutex;
|
||||
struct completion data_to_supp;
|
||||
struct completion data_from_supp;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct optee - main service struct
|
||||
* @supp_teedev: supplicant device
|
||||
* @teedev: client device
|
||||
* @invoke_fn: function to issue smc or hvc
|
||||
* @call_queue: queue of threads waiting to call @invoke_fn
|
||||
* @wait_queue: queue of threads from secure world waiting for a
|
||||
* secure world sync object
|
||||
* @supp: supplicant synchronization struct for RPC to supplicant
|
||||
* @pool: shared memory pool
|
||||
* @memremaped_shm virtual address of memory in shared memory pool
|
||||
*/
|
||||
struct optee {
|
||||
struct tee_device *supp_teedev;
|
||||
struct tee_device *teedev;
|
||||
optee_invoke_fn *invoke_fn;
|
||||
struct optee_call_queue call_queue;
|
||||
struct optee_wait_queue wait_queue;
|
||||
struct optee_supp supp;
|
||||
struct tee_shm_pool *pool;
|
||||
void *memremaped_shm;
|
||||
};
|
||||
|
||||
struct optee_session {
|
||||
struct list_head list_node;
|
||||
u32 session_id;
|
||||
};
|
||||
|
||||
struct optee_context_data {
|
||||
/* Serializes access to this struct */
|
||||
struct mutex mutex;
|
||||
struct list_head sess_list;
|
||||
};
|
||||
|
||||
struct optee_rpc_param {
|
||||
u32 a0;
|
||||
u32 a1;
|
||||
u32 a2;
|
||||
u32 a3;
|
||||
u32 a4;
|
||||
u32 a5;
|
||||
u32 a6;
|
||||
u32 a7;
|
||||
};
|
||||
|
||||
void optee_handle_rpc(struct tee_context *ctx, struct optee_rpc_param *param);
|
||||
|
||||
void optee_wait_queue_init(struct optee_wait_queue *wq);
|
||||
void optee_wait_queue_exit(struct optee_wait_queue *wq);
|
||||
|
||||
u32 optee_supp_thrd_req(struct tee_context *ctx, u32 func, size_t num_params,
|
||||
struct tee_param *param);
|
||||
|
||||
int optee_supp_read(struct tee_context *ctx, void __user *buf, size_t len);
|
||||
int optee_supp_write(struct tee_context *ctx, void __user *buf, size_t len);
|
||||
void optee_supp_init(struct optee_supp *supp);
|
||||
void optee_supp_uninit(struct optee_supp *supp);
|
||||
|
||||
int optee_supp_recv(struct tee_context *ctx, u32 *func, u32 *num_params,
|
||||
struct tee_param *param);
|
||||
int optee_supp_send(struct tee_context *ctx, u32 ret, u32 num_params,
|
||||
struct tee_param *param);
|
||||
|
||||
u32 optee_do_call_with_arg(struct tee_context *ctx, phys_addr_t parg);
|
||||
int optee_open_session(struct tee_context *ctx,
|
||||
struct tee_ioctl_open_session_arg *arg,
|
||||
struct tee_param *param);
|
||||
int optee_close_session(struct tee_context *ctx, u32 session);
|
||||
int optee_invoke_func(struct tee_context *ctx, struct tee_ioctl_invoke_arg *arg,
|
||||
struct tee_param *param);
|
||||
int optee_cancel_req(struct tee_context *ctx, u32 cancel_id, u32 session);
|
||||
|
||||
void optee_enable_shm_cache(struct optee *optee);
|
||||
void optee_disable_shm_cache(struct optee *optee);
|
||||
|
||||
int optee_from_msg_param(struct tee_param *params, size_t num_params,
|
||||
const struct optee_msg_param *msg_params);
|
||||
int optee_to_msg_param(struct optee_msg_param *msg_params, size_t num_params,
|
||||
const struct tee_param *params);
|
||||
|
||||
/*
|
||||
* Small helpers
|
||||
*/
|
||||
|
||||
static inline void *reg_pair_to_ptr(u32 reg0, u32 reg1)
|
||||
{
|
||||
return (void *)(unsigned long)(((u64)reg0 << 32) | reg1);
|
||||
}
|
||||
|
||||
static inline void reg_pair_from_64(u32 *reg0, u32 *reg1, u64 val)
|
||||
{
|
||||
*reg0 = val >> 32;
|
||||
*reg1 = val;
|
||||
}
|
||||
|
||||
#endif /*OPTEE_PRIVATE_H*/
|
||||
450
drivers/tee/optee/optee_smc.h
Normal file
450
drivers/tee/optee/optee_smc.h
Normal file
@ -0,0 +1,450 @@
|
||||
/*
|
||||
* Copyright (c) 2015-2016, Linaro Limited
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
||||
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
#ifndef OPTEE_SMC_H
|
||||
#define OPTEE_SMC_H
|
||||
|
||||
#include <linux/arm-smccc.h>
|
||||
#include <linux/bitops.h>
|
||||
|
||||
#define OPTEE_SMC_STD_CALL_VAL(func_num) \
|
||||
ARM_SMCCC_CALL_VAL(ARM_SMCCC_STD_CALL, ARM_SMCCC_SMC_32, \
|
||||
ARM_SMCCC_OWNER_TRUSTED_OS, (func_num))
|
||||
#define OPTEE_SMC_FAST_CALL_VAL(func_num) \
|
||||
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_32, \
|
||||
ARM_SMCCC_OWNER_TRUSTED_OS, (func_num))
|
||||
|
||||
/*
|
||||
* Function specified by SMC Calling convention.
|
||||
*/
|
||||
#define OPTEE_SMC_FUNCID_CALLS_COUNT 0xFF00
|
||||
#define OPTEE_SMC_CALLS_COUNT \
|
||||
ARM_SMCCC_CALL_VAL(OPTEE_SMC_FAST_CALL, SMCCC_SMC_32, \
|
||||
SMCCC_OWNER_TRUSTED_OS_END, \
|
||||
OPTEE_SMC_FUNCID_CALLS_COUNT)
|
||||
|
||||
/*
|
||||
* Normal cached memory (write-back), shareable for SMP systems and not
|
||||
* shareable for UP systems.
|
||||
*/
|
||||
#define OPTEE_SMC_SHM_CACHED 1
|
||||
|
||||
/*
|
||||
* a0..a7 is used as register names in the descriptions below, on arm32
|
||||
* that translates to r0..r7 and on arm64 to w0..w7. In both cases it's
|
||||
* 32-bit registers.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Function specified by SMC Calling convention
|
||||
*
|
||||
* Return one of the following UIDs if using API specified in this file
|
||||
* without further extentions:
|
||||
* 65cb6b93-af0c-4617-8ed6-644a8d1140f8
|
||||
* see also OPTEE_SMC_UID_* in optee_msg.h
|
||||
*/
|
||||
#define OPTEE_SMC_FUNCID_CALLS_UID OPTEE_MSG_FUNCID_CALLS_UID
|
||||
#define OPTEE_SMC_CALLS_UID \
|
||||
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_32, \
|
||||
ARM_SMCCC_OWNER_TRUSTED_OS_END, \
|
||||
OPTEE_SMC_FUNCID_CALLS_UID)
|
||||
|
||||
/*
|
||||
* Function specified by SMC Calling convention
|
||||
*
|
||||
* Returns 2.0 if using API specified in this file without further extentions.
|
||||
* see also OPTEE_MSG_REVISION_* in optee_msg.h
|
||||
*/
|
||||
#define OPTEE_SMC_FUNCID_CALLS_REVISION OPTEE_MSG_FUNCID_CALLS_REVISION
|
||||
#define OPTEE_SMC_CALLS_REVISION \
|
||||
ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_32, \
|
||||
ARM_SMCCC_OWNER_TRUSTED_OS_END, \
|
||||
OPTEE_SMC_FUNCID_CALLS_REVISION)
|
||||
|
||||
struct optee_smc_calls_revision_result {
|
||||
unsigned long major;
|
||||
unsigned long minor;
|
||||
unsigned long reserved0;
|
||||
unsigned long reserved1;
|
||||
};
|
||||
|
||||
/*
|
||||
* Get UUID of Trusted OS.
|
||||
*
|
||||
* Used by non-secure world to figure out which Trusted OS is installed.
|
||||
* Note that returned UUID is the UUID of the Trusted OS, not of the API.
|
||||
*
|
||||
* Returns UUID in a0-4 in the same way as OPTEE_SMC_CALLS_UID
|
||||
* described above.
|
||||
*/
|
||||
#define OPTEE_SMC_FUNCID_GET_OS_UUID OPTEE_MSG_FUNCID_GET_OS_UUID
|
||||
#define OPTEE_SMC_CALL_GET_OS_UUID \
|
||||
OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_OS_UUID)
|
||||
|
||||
/*
|
||||
* Get revision of Trusted OS.
|
||||
*
|
||||
* Used by non-secure world to figure out which version of the Trusted OS
|
||||
* is installed. Note that the returned revision is the revision of the
|
||||
* Trusted OS, not of the API.
|
||||
*
|
||||
* Returns revision in a0-1 in the same way as OPTEE_SMC_CALLS_REVISION
|
||||
* described above.
|
||||
*/
|
||||
#define OPTEE_SMC_FUNCID_GET_OS_REVISION OPTEE_MSG_FUNCID_GET_OS_REVISION
|
||||
#define OPTEE_SMC_CALL_GET_OS_REVISION \
|
||||
OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_OS_REVISION)
|
||||
|
||||
/*
|
||||
* Call with struct optee_msg_arg as argument
|
||||
*
|
||||
* Call register usage:
|
||||
* a0 SMC Function ID, OPTEE_SMC*CALL_WITH_ARG
|
||||
* a1 Upper 32bit of a 64bit physical pointer to a struct optee_msg_arg
|
||||
* a2 Lower 32bit of a 64bit physical pointer to a struct optee_msg_arg
|
||||
* a3 Cache settings, not used if physical pointer is in a predefined shared
|
||||
* memory area else per OPTEE_SMC_SHM_*
|
||||
* a4-6 Not used
|
||||
* a7 Hypervisor Client ID register
|
||||
*
|
||||
* Normal return register usage:
|
||||
* a0 Return value, OPTEE_SMC_RETURN_*
|
||||
* a1-3 Not used
|
||||
* a4-7 Preserved
|
||||
*
|
||||
* OPTEE_SMC_RETURN_ETHREAD_LIMIT return register usage:
|
||||
* a0 Return value, OPTEE_SMC_RETURN_ETHREAD_LIMIT
|
||||
* a1-3 Preserved
|
||||
* a4-7 Preserved
|
||||
*
|
||||
* RPC return register usage:
|
||||
* a0 Return value, OPTEE_SMC_RETURN_IS_RPC(val)
|
||||
* a1-2 RPC parameters
|
||||
* a3-7 Resume information, must be preserved
|
||||
*
|
||||
* Possible return values:
|
||||
* OPTEE_SMC_RETURN_UNKNOWN_FUNCTION Trusted OS does not recognize this
|
||||
* function.
|
||||
* OPTEE_SMC_RETURN_OK Call completed, result updated in
|
||||
* the previously supplied struct
|
||||
* optee_msg_arg.
|
||||
* OPTEE_SMC_RETURN_ETHREAD_LIMIT Number of Trusted OS threads exceeded,
|
||||
* try again later.
|
||||
* OPTEE_SMC_RETURN_EBADADDR Bad physcial pointer to struct
|
||||
* optee_msg_arg.
|
||||
* OPTEE_SMC_RETURN_EBADCMD Bad/unknown cmd in struct optee_msg_arg
|
||||
* OPTEE_SMC_RETURN_IS_RPC() Call suspended by RPC call to normal
|
||||
* world.
|
||||
*/
|
||||
#define OPTEE_SMC_FUNCID_CALL_WITH_ARG OPTEE_MSG_FUNCID_CALL_WITH_ARG
|
||||
#define OPTEE_SMC_CALL_WITH_ARG \
|
||||
OPTEE_SMC_STD_CALL_VAL(OPTEE_SMC_FUNCID_CALL_WITH_ARG)
|
||||
|
||||
/*
|
||||
* Get Shared Memory Config
|
||||
*
|
||||
* Returns the Secure/Non-secure shared memory config.
|
||||
*
|
||||
* Call register usage:
|
||||
* a0 SMC Function ID, OPTEE_SMC_GET_SHM_CONFIG
|
||||
* a1-6 Not used
|
||||
* a7 Hypervisor Client ID register
|
||||
*
|
||||
* Have config return register usage:
|
||||
* a0 OPTEE_SMC_RETURN_OK
|
||||
* a1 Physical address of start of SHM
|
||||
* a2 Size of of SHM
|
||||
* a3 Cache settings of memory, as defined by the
|
||||
* OPTEE_SMC_SHM_* values above
|
||||
* a4-7 Preserved
|
||||
*
|
||||
* Not available register usage:
|
||||
* a0 OPTEE_SMC_RETURN_ENOTAVAIL
|
||||
* a1-3 Not used
|
||||
* a4-7 Preserved
|
||||
*/
|
||||
#define OPTEE_SMC_FUNCID_GET_SHM_CONFIG 7
|
||||
#define OPTEE_SMC_GET_SHM_CONFIG \
|
||||
OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_GET_SHM_CONFIG)
|
||||
|
||||
struct optee_smc_get_shm_config_result {
|
||||
unsigned long status;
|
||||
unsigned long start;
|
||||
unsigned long size;
|
||||
unsigned long settings;
|
||||
};
|
||||
|
||||
/*
|
||||
* Exchanges capabilities between normal world and secure world
|
||||
*
|
||||
* Call register usage:
|
||||
* a0 SMC Function ID, OPTEE_SMC_EXCHANGE_CAPABILITIES
|
||||
* a1 bitfield of normal world capabilities OPTEE_SMC_NSEC_CAP_*
|
||||
* a2-6 Not used
|
||||
* a7 Hypervisor Client ID register
|
||||
*
|
||||
* Normal return register usage:
|
||||
* a0 OPTEE_SMC_RETURN_OK
|
||||
* a1 bitfield of secure world capabilities OPTEE_SMC_SEC_CAP_*
|
||||
* a2-7 Preserved
|
||||
*
|
||||
* Error return register usage:
|
||||
* a0 OPTEE_SMC_RETURN_ENOTAVAIL, can't use the capabilities from normal world
|
||||
* a1 bitfield of secure world capabilities OPTEE_SMC_SEC_CAP_*
|
||||
* a2-7 Preserved
|
||||
*/
|
||||
/* Normal world works as a uniprocessor system */
|
||||
#define OPTEE_SMC_NSEC_CAP_UNIPROCESSOR BIT(0)
|
||||
/* Secure world has reserved shared memory for normal world to use */
|
||||
#define OPTEE_SMC_SEC_CAP_HAVE_RESERVED_SHM BIT(0)
|
||||
/* Secure world can communicate via previously unregistered shared memory */
|
||||
#define OPTEE_SMC_SEC_CAP_UNREGISTERED_SHM BIT(1)
|
||||
#define OPTEE_SMC_FUNCID_EXCHANGE_CAPABILITIES 9
|
||||
#define OPTEE_SMC_EXCHANGE_CAPABILITIES \
|
||||
OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_EXCHANGE_CAPABILITIES)
|
||||
|
||||
struct optee_smc_exchange_capabilities_result {
|
||||
unsigned long status;
|
||||
unsigned long capabilities;
|
||||
unsigned long reserved0;
|
||||
unsigned long reserved1;
|
||||
};
|
||||
|
||||
/*
|
||||
* Disable and empties cache of shared memory objects
|
||||
*
|
||||
* Secure world can cache frequently used shared memory objects, for
|
||||
* example objects used as RPC arguments. When secure world is idle this
|
||||
* function returns one shared memory reference to free. To disable the
|
||||
* cache and free all cached objects this function has to be called until
|
||||
* it returns OPTEE_SMC_RETURN_ENOTAVAIL.
|
||||
*
|
||||
* Call register usage:
|
||||
* a0 SMC Function ID, OPTEE_SMC_DISABLE_SHM_CACHE
|
||||
* a1-6 Not used
|
||||
* a7 Hypervisor Client ID register
|
||||
*
|
||||
* Normal return register usage:
|
||||
* a0 OPTEE_SMC_RETURN_OK
|
||||
* a1 Upper 32bit of a 64bit Shared memory cookie
|
||||
* a2 Lower 32bit of a 64bit Shared memory cookie
|
||||
* a3-7 Preserved
|
||||
*
|
||||
* Cache empty return register usage:
|
||||
* a0 OPTEE_SMC_RETURN_ENOTAVAIL
|
||||
* a1-7 Preserved
|
||||
*
|
||||
* Not idle return register usage:
|
||||
* a0 OPTEE_SMC_RETURN_EBUSY
|
||||
* a1-7 Preserved
|
||||
*/
|
||||
#define OPTEE_SMC_FUNCID_DISABLE_SHM_CACHE 10
|
||||
#define OPTEE_SMC_DISABLE_SHM_CACHE \
|
||||
OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_DISABLE_SHM_CACHE)
|
||||
|
||||
struct optee_smc_disable_shm_cache_result {
|
||||
unsigned long status;
|
||||
unsigned long shm_upper32;
|
||||
unsigned long shm_lower32;
|
||||
unsigned long reserved0;
|
||||
};
|
||||
|
||||
/*
|
||||
* Enable cache of shared memory objects
|
||||
*
|
||||
* Secure world can cache frequently used shared memory objects, for
|
||||
* example objects used as RPC arguments. When secure world is idle this
|
||||
* function returns OPTEE_SMC_RETURN_OK and the cache is enabled. If
|
||||
* secure world isn't idle OPTEE_SMC_RETURN_EBUSY is returned.
|
||||
*
|
||||
* Call register usage:
|
||||
* a0 SMC Function ID, OPTEE_SMC_ENABLE_SHM_CACHE
|
||||
* a1-6 Not used
|
||||
* a7 Hypervisor Client ID register
|
||||
*
|
||||
* Normal return register usage:
|
||||
* a0 OPTEE_SMC_RETURN_OK
|
||||
* a1-7 Preserved
|
||||
*
|
||||
* Not idle return register usage:
|
||||
* a0 OPTEE_SMC_RETURN_EBUSY
|
||||
* a1-7 Preserved
|
||||
*/
|
||||
#define OPTEE_SMC_FUNCID_ENABLE_SHM_CACHE 11
|
||||
#define OPTEE_SMC_ENABLE_SHM_CACHE \
|
||||
OPTEE_SMC_FAST_CALL_VAL(OPTEE_SMC_FUNCID_ENABLE_SHM_CACHE)
|
||||
|
||||
/*
|
||||
* Resume from RPC (for example after processing an IRQ)
|
||||
*
|
||||
* Call register usage:
|
||||
* a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC
|
||||
* a1-3 Value of a1-3 when OPTEE_SMC_CALL_WITH_ARG returned
|
||||
* OPTEE_SMC_RETURN_RPC in a0
|
||||
*
|
||||
* Return register usage is the same as for OPTEE_SMC_*CALL_WITH_ARG above.
|
||||
*
|
||||
* Possible return values
|
||||
* OPTEE_SMC_RETURN_UNKNOWN_FUNCTION Trusted OS does not recognize this
|
||||
* function.
|
||||
* OPTEE_SMC_RETURN_OK Original call completed, result
|
||||
* updated in the previously supplied.
|
||||
* struct optee_msg_arg
|
||||
* OPTEE_SMC_RETURN_RPC Call suspended by RPC call to normal
|
||||
* world.
|
||||
* OPTEE_SMC_RETURN_ERESUME Resume failed, the opaque resume
|
||||
* information was corrupt.
|
||||
*/
|
||||
#define OPTEE_SMC_FUNCID_RETURN_FROM_RPC 3
|
||||
#define OPTEE_SMC_CALL_RETURN_FROM_RPC \
|
||||
OPTEE_SMC_STD_CALL_VAL(OPTEE_SMC_FUNCID_RETURN_FROM_RPC)
|
||||
|
||||
#define OPTEE_SMC_RETURN_RPC_PREFIX_MASK 0xFFFF0000
|
||||
#define OPTEE_SMC_RETURN_RPC_PREFIX 0xFFFF0000
|
||||
#define OPTEE_SMC_RETURN_RPC_FUNC_MASK 0x0000FFFF
|
||||
|
||||
#define OPTEE_SMC_RETURN_GET_RPC_FUNC(ret) \
|
||||
((ret) & OPTEE_SMC_RETURN_RPC_FUNC_MASK)
|
||||
|
||||
#define OPTEE_SMC_RPC_VAL(func) ((func) | OPTEE_SMC_RETURN_RPC_PREFIX)
|
||||
|
||||
/*
|
||||
* Allocate memory for RPC parameter passing. The memory is used to hold a
|
||||
* struct optee_msg_arg.
|
||||
*
|
||||
* "Call" register usage:
|
||||
* a0 This value, OPTEE_SMC_RETURN_RPC_ALLOC
|
||||
* a1 Size in bytes of required argument memory
|
||||
* a2 Not used
|
||||
* a3 Resume information, must be preserved
|
||||
* a4-5 Not used
|
||||
* a6-7 Resume information, must be preserved
|
||||
*
|
||||
* "Return" register usage:
|
||||
* a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC.
|
||||
* a1 Upper 32bits of 64bit physical pointer to allocated
|
||||
* memory, (a1 == 0 && a2 == 0) if size was 0 or if memory can't
|
||||
* be allocated.
|
||||
* a2 Lower 32bits of 64bit physical pointer to allocated
|
||||
* memory, (a1 == 0 && a2 == 0) if size was 0 or if memory can't
|
||||
* be allocated
|
||||
* a3 Preserved
|
||||
* a4 Upper 32bits of 64bit Shared memory cookie used when freeing
|
||||
* the memory or doing an RPC
|
||||
* a5 Lower 32bits of 64bit Shared memory cookie used when freeing
|
||||
* the memory or doing an RPC
|
||||
* a6-7 Preserved
|
||||
*/
|
||||
#define OPTEE_SMC_RPC_FUNC_ALLOC 0
|
||||
#define OPTEE_SMC_RETURN_RPC_ALLOC \
|
||||
OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_ALLOC)
|
||||
|
||||
/*
|
||||
* Free memory previously allocated by OPTEE_SMC_RETURN_RPC_ALLOC
|
||||
*
|
||||
* "Call" register usage:
|
||||
* a0 This value, OPTEE_SMC_RETURN_RPC_FREE
|
||||
* a1 Upper 32bits of 64bit shared memory cookie belonging to this
|
||||
* argument memory
|
||||
* a2 Lower 32bits of 64bit shared memory cookie belonging to this
|
||||
* argument memory
|
||||
* a3-7 Resume information, must be preserved
|
||||
*
|
||||
* "Return" register usage:
|
||||
* a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC.
|
||||
* a1-2 Not used
|
||||
* a3-7 Preserved
|
||||
*/
|
||||
#define OPTEE_SMC_RPC_FUNC_FREE 2
|
||||
#define OPTEE_SMC_RETURN_RPC_FREE \
|
||||
OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_FREE)
|
||||
|
||||
/*
|
||||
* Deliver an IRQ in normal world.
|
||||
*
|
||||
* "Call" register usage:
|
||||
* a0 OPTEE_SMC_RETURN_RPC_IRQ
|
||||
* a1-7 Resume information, must be preserved
|
||||
*
|
||||
* "Return" register usage:
|
||||
* a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC.
|
||||
* a1-7 Preserved
|
||||
*/
|
||||
#define OPTEE_SMC_RPC_FUNC_IRQ 4
|
||||
#define OPTEE_SMC_RETURN_RPC_IRQ \
|
||||
OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_IRQ)
|
||||
|
||||
/*
|
||||
* Do an RPC request. The supplied struct optee_msg_arg tells which
|
||||
* request to do and the parameters for the request. The following fields
|
||||
* are used (the rest are unused):
|
||||
* - cmd the Request ID
|
||||
* - ret return value of the request, filled in by normal world
|
||||
* - num_params number of parameters for the request
|
||||
* - params the parameters
|
||||
* - param_attrs attributes of the parameters
|
||||
*
|
||||
* "Call" register usage:
|
||||
* a0 OPTEE_SMC_RETURN_RPC_CMD
|
||||
* a1 Upper 32bit of a 64bit Shared memory cookie holding a
|
||||
* struct optee_msg_arg, must be preserved, only the data should
|
||||
* be updated
|
||||
* a2 Lower 32bit of a 64bit Shared memory cookie holding a
|
||||
* struct optee_msg_arg, must be preserved, only the data should
|
||||
* be updated
|
||||
* a3-7 Resume information, must be preserved
|
||||
*
|
||||
* "Return" register usage:
|
||||
* a0 SMC Function ID, OPTEE_SMC_CALL_RETURN_FROM_RPC.
|
||||
* a1-2 Not used
|
||||
* a3-7 Preserved
|
||||
*/
|
||||
#define OPTEE_SMC_RPC_FUNC_CMD 5
|
||||
#define OPTEE_SMC_RETURN_RPC_CMD \
|
||||
OPTEE_SMC_RPC_VAL(OPTEE_SMC_RPC_FUNC_CMD)
|
||||
|
||||
/* Returned in a0 */
|
||||
#define OPTEE_SMC_RETURN_UNKNOWN_FUNCTION 0xFFFFFFFF
|
||||
|
||||
/* Returned in a0 only from Trusted OS functions */
|
||||
#define OPTEE_SMC_RETURN_OK 0x0
|
||||
#define OPTEE_SMC_RETURN_ETHREAD_LIMIT 0x1
|
||||
#define OPTEE_SMC_RETURN_EBUSY 0x2
|
||||
#define OPTEE_SMC_RETURN_ERESUME 0x3
|
||||
#define OPTEE_SMC_RETURN_EBADADDR 0x4
|
||||
#define OPTEE_SMC_RETURN_EBADCMD 0x5
|
||||
#define OPTEE_SMC_RETURN_ENOMEM 0x6
|
||||
#define OPTEE_SMC_RETURN_ENOTAVAIL 0x7
|
||||
#define OPTEE_SMC_RETURN_IS_RPC(ret) __optee_smc_return_is_rpc((ret))
|
||||
|
||||
static inline bool __optee_smc_return_is_rpc(u32 ret)
|
||||
{
|
||||
return ret != OPTEE_SMC_RETURN_UNKNOWN_FUNCTION &&
|
||||
(ret & OPTEE_SMC_RETURN_RPC_PREFIX_MASK) ==
|
||||
OPTEE_SMC_RETURN_RPC_PREFIX;
|
||||
}
|
||||
|
||||
#endif /* OPTEE_SMC_H */
|
||||
396
drivers/tee/optee/rpc.c
Normal file
396
drivers/tee/optee/rpc.c
Normal file
@ -0,0 +1,396 @@
|
||||
/*
|
||||
* Copyright (c) 2015-2016, Linaro Limited
|
||||
*
|
||||
* This software is licensed under the terms of the GNU General Public
|
||||
* License version 2, as published by the Free Software Foundation, and
|
||||
* may be copied, distributed, and modified under those terms.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
*/
|
||||
|
||||
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
||||
|
||||
#include <linux/delay.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/tee_drv.h>
|
||||
#include "optee_private.h"
|
||||
#include "optee_smc.h"
|
||||
|
||||
struct wq_entry {
|
||||
struct list_head link;
|
||||
struct completion c;
|
||||
u32 key;
|
||||
};
|
||||
|
||||
void optee_wait_queue_init(struct optee_wait_queue *priv)
|
||||
{
|
||||
mutex_init(&priv->mu);
|
||||
INIT_LIST_HEAD(&priv->db);
|
||||
}
|
||||
|
||||
void optee_wait_queue_exit(struct optee_wait_queue *priv)
|
||||
{
|
||||
mutex_destroy(&priv->mu);
|
||||
}
|
||||
|
||||
static void handle_rpc_func_cmd_get_time(struct optee_msg_arg *arg)
|
||||
{
|
||||
struct timespec64 ts;
|
||||
|
||||
if (arg->num_params != 1)
|
||||
goto bad;
|
||||
if ((arg->params[0].attr & OPTEE_MSG_ATTR_TYPE_MASK) !=
|
||||
OPTEE_MSG_ATTR_TYPE_VALUE_OUTPUT)
|
||||
goto bad;
|
||||
|
||||
getnstimeofday64(&ts);
|
||||
arg->params[0].u.value.a = ts.tv_sec;
|
||||
arg->params[0].u.value.b = ts.tv_nsec;
|
||||
|
||||
arg->ret = TEEC_SUCCESS;
|
||||
return;
|
||||
bad:
|
||||
arg->ret = TEEC_ERROR_BAD_PARAMETERS;
|
||||
}
|
||||
|
||||
static struct wq_entry *wq_entry_get(struct optee_wait_queue *wq, u32 key)
|
||||
{
|
||||
struct wq_entry *w;
|
||||
|
||||
mutex_lock(&wq->mu);
|
||||
|
||||
list_for_each_entry(w, &wq->db, link)
|
||||
if (w->key == key)
|
||||
goto out;
|
||||
|
||||
w = kmalloc(sizeof(*w), GFP_KERNEL);
|
||||
if (w) {
|
||||
init_completion(&w->c);
|
||||
w->key = key;
|
||||
list_add_tail(&w->link, &wq->db);
|
||||
}
|
||||
out:
|
||||
mutex_unlock(&wq->mu);
|
||||
return w;
|
||||
}
|
||||
|
||||
static void wq_sleep(struct optee_wait_queue *wq, u32 key)
|
||||
{
|
||||
struct wq_entry *w = wq_entry_get(wq, key);
|
||||
|
||||
if (w) {
|
||||
wait_for_completion(&w->c);
|
||||
mutex_lock(&wq->mu);
|
||||
list_del(&w->link);
|
||||
mutex_unlock(&wq->mu);
|
||||
kfree(w);
|
||||
}
|
||||
}
|
||||
|
||||
static void wq_wakeup(struct optee_wait_queue *wq, u32 key)
|
||||
{
|
||||
struct wq_entry *w = wq_entry_get(wq, key);
|
||||
|
||||
if (w)
|
||||
complete(&w->c);
|
||||
}
|
||||
|
||||
static void handle_rpc_func_cmd_wq(struct optee *optee,
|
||||
struct optee_msg_arg *arg)
|
||||
{
|
||||
if (arg->num_params != 1)
|
||||
goto bad;
|
||||
|
||||
if ((arg->params[0].attr & OPTEE_MSG_ATTR_TYPE_MASK) !=
|
||||
OPTEE_MSG_ATTR_TYPE_VALUE_INPUT)
|
||||
goto bad;
|
||||
|
||||
switch (arg->params[0].u.value.a) {
|
||||
case OPTEE_MSG_RPC_WAIT_QUEUE_SLEEP:
|
||||
wq_sleep(&optee->wait_queue, arg->params[0].u.value.b);
|
||||
break;
|
||||
case OPTEE_MSG_RPC_WAIT_QUEUE_WAKEUP:
|
||||
wq_wakeup(&optee->wait_queue, arg->params[0].u.value.b);
|
||||
break;
|
||||
default:
|
||||
goto bad;
|
||||
}
|
||||
|
||||
arg->ret = TEEC_SUCCESS;
|
||||
return;
|
||||
bad:
|
||||
arg->ret = TEEC_ERROR_BAD_PARAMETERS;
|
||||
}
|
||||
|
||||
static void handle_rpc_func_cmd_wait(struct optee_msg_arg *arg)
|
||||
{
|
||||
u32 msec_to_wait;
|
||||
|
||||
if (arg->num_params != 1)
|
||||
goto bad;
|
||||
|
||||
if ((arg->params[0].attr & OPTEE_MSG_ATTR_TYPE_MASK) !=
|
||||
OPTEE_MSG_ATTR_TYPE_VALUE_INPUT)
|
||||
goto bad;
|
||||
|
||||
msec_to_wait = arg->params[0].u.value.a;
|
||||
|
||||
/* set task's state to interruptible sleep */
|
||||
set_current_state(TASK_INTERRUPTIBLE);
|
||||
|
||||
/* take a nap */
|
||||
msleep(msec_to_wait);
|
||||
|
||||
arg->ret = TEEC_SUCCESS;
|
||||
return;
|
||||
bad:
|
||||
arg->ret = TEEC_ERROR_BAD_PARAMETERS;
|
||||
}
|
||||
|
||||
static void handle_rpc_supp_cmd(struct tee_context *ctx,
|
||||
struct optee_msg_arg *arg)
|
||||
{
|
||||
struct tee_param *params;
|
||||
|
||||
arg->ret_origin = TEEC_ORIGIN_COMMS;
|
||||
|
||||
params = kmalloc_array(arg->num_params, sizeof(struct tee_param),
|
||||
GFP_KERNEL);
|
||||
if (!params) {
|
||||
arg->ret = TEEC_ERROR_OUT_OF_MEMORY;
|
||||
return;
|
||||
}
|
||||
|
||||
if (optee_from_msg_param(params, arg->num_params, arg->params)) {
|
||||
arg->ret = TEEC_ERROR_BAD_PARAMETERS;
|
||||
goto out;
|
||||
}
|
||||
|
||||
arg->ret = optee_supp_thrd_req(ctx, arg->cmd, arg->num_params, params);
|
||||
|
||||
if (optee_to_msg_param(arg->params, arg->num_params, params))
|
||||
arg->ret = TEEC_ERROR_BAD_PARAMETERS;
|
||||
out:
|
||||
kfree(params);
|
||||
}
|
||||
|
||||
static struct tee_shm *cmd_alloc_suppl(struct tee_context *ctx, size_t sz)
|
||||
{
|
||||
u32 ret;
|
||||
struct tee_param param;
|
||||
struct optee *optee = tee_get_drvdata(ctx->teedev);
|
||||
struct tee_shm *shm;
|
||||
|
||||
param.attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT;
|
||||
param.u.value.a = OPTEE_MSG_RPC_SHM_TYPE_APPL;
|
||||
param.u.value.b = sz;
|
||||
param.u.value.c = 0;
|
||||
|
||||
ret = optee_supp_thrd_req(ctx, OPTEE_MSG_RPC_CMD_SHM_ALLOC, 1, ¶m);
|
||||
if (ret)
|
||||
return ERR_PTR(-ENOMEM);
|
||||
|
||||
mutex_lock(&optee->supp.ctx_mutex);
|
||||
/* Increases count as secure world doesn't have a reference */
|
||||
shm = tee_shm_get_from_id(optee->supp.ctx, param.u.value.c);
|
||||
mutex_unlock(&optee->supp.ctx_mutex);
|
||||
return shm;
|
||||
}
|
||||
|
||||
static void handle_rpc_func_cmd_shm_alloc(struct tee_context *ctx,
|
||||
struct optee_msg_arg *arg)
|
||||
{
|
||||
phys_addr_t pa;
|
||||
struct tee_shm *shm;
|
||||
size_t sz;
|
||||
size_t n;
|
||||
|
||||
arg->ret_origin = TEEC_ORIGIN_COMMS;
|
||||
|
||||
if (!arg->num_params ||
|
||||
arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT) {
|
||||
arg->ret = TEEC_ERROR_BAD_PARAMETERS;
|
||||
return;
|
||||
}
|
||||
|
||||
for (n = 1; n < arg->num_params; n++) {
|
||||
if (arg->params[n].attr != OPTEE_MSG_ATTR_TYPE_NONE) {
|
||||
arg->ret = TEEC_ERROR_BAD_PARAMETERS;
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
sz = arg->params[0].u.value.b;
|
||||
switch (arg->params[0].u.value.a) {
|
||||
case OPTEE_MSG_RPC_SHM_TYPE_APPL:
|
||||
shm = cmd_alloc_suppl(ctx, sz);
|
||||
break;
|
||||
case OPTEE_MSG_RPC_SHM_TYPE_KERNEL:
|
||||
shm = tee_shm_alloc(ctx, sz, TEE_SHM_MAPPED);
|
||||
break;
|
||||
default:
|
||||
arg->ret = TEEC_ERROR_BAD_PARAMETERS;
|
||||
return;
|
||||
}
|
||||
|
||||
if (IS_ERR(shm)) {
|
||||
arg->ret = TEEC_ERROR_OUT_OF_MEMORY;
|
||||
return;
|
||||
}
|
||||
|
||||
if (tee_shm_get_pa(shm, 0, &pa)) {
|
||||
arg->ret = TEEC_ERROR_BAD_PARAMETERS;
|
||||
goto bad;
|
||||
}
|
||||
|
||||
arg->params[0].attr = OPTEE_MSG_ATTR_TYPE_TMEM_OUTPUT;
|
||||
arg->params[0].u.tmem.buf_ptr = pa;
|
||||
arg->params[0].u.tmem.size = sz;
|
||||
arg->params[0].u.tmem.shm_ref = (unsigned long)shm;
|
||||
arg->ret = TEEC_SUCCESS;
|
||||
return;
|
||||
bad:
|
||||
tee_shm_free(shm);
|
||||
}
|
||||
|
||||
static void cmd_free_suppl(struct tee_context *ctx, struct tee_shm *shm)
|
||||
{
|
||||
struct tee_param param;
|
||||
|
||||
param.attr = TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT;
|
||||
param.u.value.a = OPTEE_MSG_RPC_SHM_TYPE_APPL;
|
||||
param.u.value.b = tee_shm_get_id(shm);
|
||||
param.u.value.c = 0;
|
||||
|
||||
/*
|
||||
* Match the tee_shm_get_from_id() in cmd_alloc_suppl() as secure
|
||||
* world has released its reference.
|
||||
*
|
||||
* It's better to do this before sending the request to supplicant
|
||||
* as we'd like to let the process doing the initial allocation to
|
||||
* do release the last reference too in order to avoid stacking
|
||||
* many pending fput() on the client process. This could otherwise
|
||||
* happen if secure world does many allocate and free in a single
|
||||
* invoke.
|
||||
*/
|
||||
tee_shm_put(shm);
|
||||
|
||||
optee_supp_thrd_req(ctx, OPTEE_MSG_RPC_CMD_SHM_FREE, 1, ¶m);
|
||||
}
|
||||
|
||||
static void handle_rpc_func_cmd_shm_free(struct tee_context *ctx,
|
||||
struct optee_msg_arg *arg)
|
||||
{
|
||||
struct tee_shm *shm;
|
||||
|
||||
arg->ret_origin = TEEC_ORIGIN_COMMS;
|
||||
|
||||
if (arg->num_params != 1 ||
|
||||
arg->params[0].attr != OPTEE_MSG_ATTR_TYPE_VALUE_INPUT) {
|
||||
arg->ret = TEEC_ERROR_BAD_PARAMETERS;
|
||||
return;
|
||||
}
|
||||
|
||||
shm = (struct tee_shm *)(unsigned long)arg->params[0].u.value.b;
|
||||
switch (arg->params[0].u.value.a) {
|
||||
case OPTEE_MSG_RPC_SHM_TYPE_APPL:
|
||||
cmd_free_suppl(ctx, shm);
|
||||
break;
|
||||
case OPTEE_MSG_RPC_SHM_TYPE_KERNEL:
|
||||
tee_shm_free(shm);
|
||||
break;
|
||||
default:
|
||||
arg->ret = TEEC_ERROR_BAD_PARAMETERS;
|
||||
}
|
||||
arg->ret = TEEC_SUCCESS;
|
||||
}
|
||||
|
||||
static void handle_rpc_func_cmd(struct tee_context *ctx, struct optee *optee,
|
||||
struct tee_shm *shm)
|
||||
{
|
||||
struct optee_msg_arg *arg;
|
||||
|
||||
arg = tee_shm_get_va(shm, 0);
|
||||
if (IS_ERR(arg)) {
|
||||
pr_err("%s: tee_shm_get_va %p failed\n", __func__, shm);
|
||||
return;
|
||||
}
|
||||
|
||||
switch (arg->cmd) {
|
||||
case OPTEE_MSG_RPC_CMD_GET_TIME:
|
||||
handle_rpc_func_cmd_get_time(arg);
|
||||
break;
|
||||
case OPTEE_MSG_RPC_CMD_WAIT_QUEUE:
|
||||
handle_rpc_func_cmd_wq(optee, arg);
|
||||
break;
|
||||
case OPTEE_MSG_RPC_CMD_SUSPEND:
|
||||
handle_rpc_func_cmd_wait(arg);
|
||||
break;
|
||||
case OPTEE_MSG_RPC_CMD_SHM_ALLOC:
|
||||
handle_rpc_func_cmd_shm_alloc(ctx, arg);
|
||||
break;
|
||||
case OPTEE_MSG_RPC_CMD_SHM_FREE:
|
||||
handle_rpc_func_cmd_shm_free(ctx, arg);
|
||||
break;
|
||||
default:
|
||||
handle_rpc_supp_cmd(ctx, arg);
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* optee_handle_rpc() - handle RPC from secure world
|
||||
* @ctx: context doing the RPC
|
||||
* @param: value of registers for the RPC
|
||||
*
|
||||
* Result of RPC is written back into @param.
|
||||
*/
|
||||
void optee_handle_rpc(struct tee_context *ctx, struct optee_rpc_param *param)
|
||||
{
|
||||
struct tee_device *teedev = ctx->teedev;
|
||||
struct optee *optee = tee_get_drvdata(teedev);
|
||||
struct tee_shm *shm;
|
||||
phys_addr_t pa;
|
||||
|
||||
switch (OPTEE_SMC_RETURN_GET_RPC_FUNC(param->a0)) {
|
||||
case OPTEE_SMC_RPC_FUNC_ALLOC:
|
||||
shm = tee_shm_alloc(ctx, param->a1, TEE_SHM_MAPPED);
|
||||
if (!IS_ERR(shm) && !tee_shm_get_pa(shm, 0, &pa)) {
|
||||
reg_pair_from_64(¶m->a1, ¶m->a2, pa);
|
||||
reg_pair_from_64(¶m->a4, ¶m->a5,
|
||||
(unsigned long)shm);
|
||||
} else {
|
||||
param->a1 = 0;
|
||||
param->a2 = 0;
|
||||
param->a4 = 0;
|
||||
param->a5 = 0;
|
||||
}
|
||||
break;
|
||||
case OPTEE_SMC_RPC_FUNC_FREE:
|
||||
shm = reg_pair_to_ptr(param->a1, param->a2);
|
||||
tee_shm_free(shm);
|
||||
break;
|
||||
case OPTEE_SMC_RPC_FUNC_IRQ:
|
||||
/*
|
||||
* An IRQ was raised while secure world was executing,
|
||||
* since all IRQs are handled in Linux a dummy RPC is
|
||||
* performed to let Linux take the IRQ through the normal
|
||||
* vector.
|
||||
*/
|
||||
break;
|
||||
case OPTEE_SMC_RPC_FUNC_CMD:
|
||||
shm = reg_pair_to_ptr(param->a1, param->a2);
|
||||
handle_rpc_func_cmd(ctx, optee, shm);
|
||||
break;
|
||||
default:
|
||||
pr_warn("Unknown RPC func 0x%x\n",
|
||||
(u32)OPTEE_SMC_RETURN_GET_RPC_FUNC(param->a0));
|
||||
break;
|
||||
}
|
||||
|
||||
param->a0 = OPTEE_SMC_CALL_RETURN_FROM_RPC;
|
||||
}
|
||||
273
drivers/tee/optee/supp.c
Normal file
273
drivers/tee/optee/supp.c
Normal file
@ -0,0 +1,273 @@
|
||||
/*
|
||||
* Copyright (c) 2015, Linaro Limited
|
||||
*
|
||||
* This software is licensed under the terms of the GNU General Public
|
||||
* License version 2, as published by the Free Software Foundation, and
|
||||
* may be copied, distributed, and modified under those terms.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
*/
|
||||
#include <linux/device.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/uaccess.h>
|
||||
#include "optee_private.h"
|
||||
|
||||
void optee_supp_init(struct optee_supp *supp)
|
||||
{
|
||||
memset(supp, 0, sizeof(*supp));
|
||||
mutex_init(&supp->ctx_mutex);
|
||||
mutex_init(&supp->thrd_mutex);
|
||||
mutex_init(&supp->supp_mutex);
|
||||
init_completion(&supp->data_to_supp);
|
||||
init_completion(&supp->data_from_supp);
|
||||
}
|
||||
|
||||
void optee_supp_uninit(struct optee_supp *supp)
|
||||
{
|
||||
mutex_destroy(&supp->ctx_mutex);
|
||||
mutex_destroy(&supp->thrd_mutex);
|
||||
mutex_destroy(&supp->supp_mutex);
|
||||
}
|
||||
|
||||
/**
|
||||
* optee_supp_thrd_req() - request service from supplicant
|
||||
* @ctx: context doing the request
|
||||
* @func: function requested
|
||||
* @num_params: number of elements in @param array
|
||||
* @param: parameters for function
|
||||
*
|
||||
* Returns result of operation to be passed to secure world
|
||||
*/
|
||||
u32 optee_supp_thrd_req(struct tee_context *ctx, u32 func, size_t num_params,
|
||||
struct tee_param *param)
|
||||
{
|
||||
bool interruptable;
|
||||
struct optee *optee = tee_get_drvdata(ctx->teedev);
|
||||
struct optee_supp *supp = &optee->supp;
|
||||
u32 ret;
|
||||
|
||||
/*
|
||||
* Other threads blocks here until we've copied our answer from
|
||||
* supplicant.
|
||||
*/
|
||||
while (mutex_lock_interruptible(&supp->thrd_mutex)) {
|
||||
/* See comment below on when the RPC can be interrupted. */
|
||||
mutex_lock(&supp->ctx_mutex);
|
||||
interruptable = !supp->ctx;
|
||||
mutex_unlock(&supp->ctx_mutex);
|
||||
if (interruptable)
|
||||
return TEEC_ERROR_COMMUNICATION;
|
||||
}
|
||||
|
||||
/*
|
||||
* We have exclusive access now since the supplicant at this
|
||||
* point is either doing a
|
||||
* wait_for_completion_interruptible(&supp->data_to_supp) or is in
|
||||
* userspace still about to do the ioctl() to enter
|
||||
* optee_supp_recv() below.
|
||||
*/
|
||||
|
||||
supp->func = func;
|
||||
supp->num_params = num_params;
|
||||
supp->param = param;
|
||||
supp->req_posted = true;
|
||||
|
||||
/* Let supplicant get the data */
|
||||
complete(&supp->data_to_supp);
|
||||
|
||||
/*
|
||||
* Wait for supplicant to process and return result, once we've
|
||||
* returned from wait_for_completion(data_from_supp) we have
|
||||
* exclusive access again.
|
||||
*/
|
||||
while (wait_for_completion_interruptible(&supp->data_from_supp)) {
|
||||
mutex_lock(&supp->ctx_mutex);
|
||||
interruptable = !supp->ctx;
|
||||
if (interruptable) {
|
||||
/*
|
||||
* There's no supplicant available and since the
|
||||
* supp->ctx_mutex currently is held none can
|
||||
* become available until the mutex released
|
||||
* again.
|
||||
*
|
||||
* Interrupting an RPC to supplicant is only
|
||||
* allowed as a way of slightly improving the user
|
||||
* experience in case the supplicant hasn't been
|
||||
* started yet. During normal operation the supplicant
|
||||
* will serve all requests in a timely manner and
|
||||
* interrupting then wouldn't make sense.
|
||||
*/
|
||||
supp->ret = TEEC_ERROR_COMMUNICATION;
|
||||
init_completion(&supp->data_to_supp);
|
||||
}
|
||||
mutex_unlock(&supp->ctx_mutex);
|
||||
if (interruptable)
|
||||
break;
|
||||
}
|
||||
|
||||
ret = supp->ret;
|
||||
supp->param = NULL;
|
||||
supp->req_posted = false;
|
||||
|
||||
/* We're done, let someone else talk to the supplicant now. */
|
||||
mutex_unlock(&supp->thrd_mutex);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/**
|
||||
* optee_supp_recv() - receive request for supplicant
|
||||
* @ctx: context receiving the request
|
||||
* @func: requested function in supplicant
|
||||
* @num_params: number of elements allocated in @param, updated with number
|
||||
* used elements
|
||||
* @param: space for parameters for @func
|
||||
*
|
||||
* Returns 0 on success or <0 on failure
|
||||
*/
|
||||
int optee_supp_recv(struct tee_context *ctx, u32 *func, u32 *num_params,
|
||||
struct tee_param *param)
|
||||
{
|
||||
struct tee_device *teedev = ctx->teedev;
|
||||
struct optee *optee = tee_get_drvdata(teedev);
|
||||
struct optee_supp *supp = &optee->supp;
|
||||
int rc;
|
||||
|
||||
/*
|
||||
* In case two threads in one supplicant is calling this function
|
||||
* simultaneously we need to protect the data with a mutex which
|
||||
* we'll release before returning.
|
||||
*/
|
||||
mutex_lock(&supp->supp_mutex);
|
||||
|
||||
if (supp->supp_next_send) {
|
||||
/*
|
||||
* optee_supp_recv() has been called again without
|
||||
* a optee_supp_send() in between. Supplicant has
|
||||
* probably been restarted before it was able to
|
||||
* write back last result. Abort last request and
|
||||
* wait for a new.
|
||||
*/
|
||||
if (supp->req_posted) {
|
||||
supp->ret = TEEC_ERROR_COMMUNICATION;
|
||||
supp->supp_next_send = false;
|
||||
complete(&supp->data_from_supp);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* This is where supplicant will be hanging most of the
|
||||
* time, let's make this interruptable so we can easily
|
||||
* restart supplicant if needed.
|
||||
*/
|
||||
if (wait_for_completion_interruptible(&supp->data_to_supp)) {
|
||||
rc = -ERESTARTSYS;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* We have exlusive access to the data */
|
||||
|
||||
if (*num_params < supp->num_params) {
|
||||
/*
|
||||
* Not enough room for parameters, tell supplicant
|
||||
* it failed and abort last request.
|
||||
*/
|
||||
supp->ret = TEEC_ERROR_COMMUNICATION;
|
||||
rc = -EINVAL;
|
||||
complete(&supp->data_from_supp);
|
||||
goto out;
|
||||
}
|
||||
|
||||
*func = supp->func;
|
||||
*num_params = supp->num_params;
|
||||
memcpy(param, supp->param,
|
||||
sizeof(struct tee_param) * supp->num_params);
|
||||
|
||||
/* Allow optee_supp_send() below to do its work */
|
||||
supp->supp_next_send = true;
|
||||
|
||||
rc = 0;
|
||||
out:
|
||||
mutex_unlock(&supp->supp_mutex);
|
||||
return rc;
|
||||
}
|
||||
|
||||
/**
|
||||
* optee_supp_send() - send result of request from supplicant
|
||||
* @ctx: context sending result
|
||||
* @ret: return value of request
|
||||
* @num_params: number of parameters returned
|
||||
* @param: returned parameters
|
||||
*
|
||||
* Returns 0 on success or <0 on failure.
|
||||
*/
|
||||
int optee_supp_send(struct tee_context *ctx, u32 ret, u32 num_params,
|
||||
struct tee_param *param)
|
||||
{
|
||||
struct tee_device *teedev = ctx->teedev;
|
||||
struct optee *optee = tee_get_drvdata(teedev);
|
||||
struct optee_supp *supp = &optee->supp;
|
||||
size_t n;
|
||||
int rc = 0;
|
||||
|
||||
/*
|
||||
* We still have exclusive access to the data since that's how we
|
||||
* left it when returning from optee_supp_read().
|
||||
*/
|
||||
|
||||
/* See comment on mutex in optee_supp_read() above */
|
||||
mutex_lock(&supp->supp_mutex);
|
||||
|
||||
if (!supp->supp_next_send) {
|
||||
/*
|
||||
* Something strange is going on, supplicant shouldn't
|
||||
* enter optee_supp_send() in this state
|
||||
*/
|
||||
rc = -ENOENT;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (num_params != supp->num_params) {
|
||||
/*
|
||||
* Something is wrong, let supplicant restart. Next call to
|
||||
* optee_supp_recv() will give an error to the requesting
|
||||
* thread and release it.
|
||||
*/
|
||||
rc = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Update out and in/out parameters */
|
||||
for (n = 0; n < num_params; n++) {
|
||||
struct tee_param *p = supp->param + n;
|
||||
|
||||
switch (p->attr) {
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT:
|
||||
p->u.value.a = param[n].u.value.a;
|
||||
p->u.value.b = param[n].u.value.b;
|
||||
p->u.value.c = param[n].u.value.c;
|
||||
break;
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
|
||||
p->u.memref.size = param[n].u.memref.size;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
supp->ret = ret;
|
||||
|
||||
/* Allow optee_supp_recv() above to do its work */
|
||||
supp->supp_next_send = false;
|
||||
|
||||
/* Let the requesting thread continue */
|
||||
complete(&supp->data_from_supp);
|
||||
out:
|
||||
mutex_unlock(&supp->supp_mutex);
|
||||
return rc;
|
||||
}
|
||||
893
drivers/tee/tee_core.c
Normal file
893
drivers/tee/tee_core.c
Normal file
@ -0,0 +1,893 @@
|
||||
/*
|
||||
* Copyright (c) 2015-2016, Linaro Limited
|
||||
*
|
||||
* This software is licensed under the terms of the GNU General Public
|
||||
* License version 2, as published by the Free Software Foundation, and
|
||||
* may be copied, distributed, and modified under those terms.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
*/
|
||||
|
||||
#define pr_fmt(fmt) "%s: " fmt, __func__
|
||||
|
||||
#include <linux/cdev.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/fs.h>
|
||||
#include <linux/idr.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/tee_drv.h>
|
||||
#include <linux/uaccess.h>
|
||||
#include "tee_private.h"
|
||||
|
||||
#define TEE_NUM_DEVICES 32
|
||||
|
||||
#define TEE_IOCTL_PARAM_SIZE(x) (sizeof(struct tee_param) * (x))
|
||||
|
||||
/*
|
||||
* Unprivileged devices in the lower half range and privileged devices in
|
||||
* the upper half range.
|
||||
*/
|
||||
static DECLARE_BITMAP(dev_mask, TEE_NUM_DEVICES);
|
||||
static DEFINE_SPINLOCK(driver_lock);
|
||||
|
||||
static struct class *tee_class;
|
||||
static dev_t tee_devt;
|
||||
|
||||
static int tee_open(struct inode *inode, struct file *filp)
|
||||
{
|
||||
int rc;
|
||||
struct tee_device *teedev;
|
||||
struct tee_context *ctx;
|
||||
|
||||
teedev = container_of(inode->i_cdev, struct tee_device, cdev);
|
||||
if (!tee_device_get(teedev))
|
||||
return -EINVAL;
|
||||
|
||||
ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
|
||||
if (!ctx) {
|
||||
rc = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
|
||||
ctx->teedev = teedev;
|
||||
INIT_LIST_HEAD(&ctx->list_shm);
|
||||
filp->private_data = ctx;
|
||||
rc = teedev->desc->ops->open(ctx);
|
||||
if (rc)
|
||||
goto err;
|
||||
|
||||
return 0;
|
||||
err:
|
||||
kfree(ctx);
|
||||
tee_device_put(teedev);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int tee_release(struct inode *inode, struct file *filp)
|
||||
{
|
||||
struct tee_context *ctx = filp->private_data;
|
||||
struct tee_device *teedev = ctx->teedev;
|
||||
struct tee_shm *shm;
|
||||
|
||||
ctx->teedev->desc->ops->release(ctx);
|
||||
mutex_lock(&ctx->teedev->mutex);
|
||||
list_for_each_entry(shm, &ctx->list_shm, link)
|
||||
shm->ctx = NULL;
|
||||
mutex_unlock(&ctx->teedev->mutex);
|
||||
kfree(ctx);
|
||||
tee_device_put(teedev);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tee_ioctl_version(struct tee_context *ctx,
|
||||
struct tee_ioctl_version_data __user *uvers)
|
||||
{
|
||||
struct tee_ioctl_version_data vers;
|
||||
|
||||
ctx->teedev->desc->ops->get_version(ctx->teedev, &vers);
|
||||
if (copy_to_user(uvers, &vers, sizeof(vers)))
|
||||
return -EFAULT;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tee_ioctl_shm_alloc(struct tee_context *ctx,
|
||||
struct tee_ioctl_shm_alloc_data __user *udata)
|
||||
{
|
||||
long ret;
|
||||
struct tee_ioctl_shm_alloc_data data;
|
||||
struct tee_shm *shm;
|
||||
|
||||
if (copy_from_user(&data, udata, sizeof(data)))
|
||||
return -EFAULT;
|
||||
|
||||
/* Currently no input flags are supported */
|
||||
if (data.flags)
|
||||
return -EINVAL;
|
||||
|
||||
data.id = -1;
|
||||
|
||||
shm = tee_shm_alloc(ctx, data.size, TEE_SHM_MAPPED | TEE_SHM_DMA_BUF);
|
||||
if (IS_ERR(shm))
|
||||
return PTR_ERR(shm);
|
||||
|
||||
data.id = shm->id;
|
||||
data.flags = shm->flags;
|
||||
data.size = shm->size;
|
||||
|
||||
if (copy_to_user(udata, &data, sizeof(data)))
|
||||
ret = -EFAULT;
|
||||
else
|
||||
ret = tee_shm_get_fd(shm);
|
||||
|
||||
/*
|
||||
* When user space closes the file descriptor the shared memory
|
||||
* should be freed or if tee_shm_get_fd() failed then it will
|
||||
* be freed immediately.
|
||||
*/
|
||||
tee_shm_put(shm);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int params_from_user(struct tee_context *ctx, struct tee_param *params,
|
||||
size_t num_params,
|
||||
struct tee_ioctl_param __user *uparams)
|
||||
{
|
||||
size_t n;
|
||||
|
||||
for (n = 0; n < num_params; n++) {
|
||||
struct tee_shm *shm;
|
||||
struct tee_ioctl_param ip;
|
||||
|
||||
if (copy_from_user(&ip, uparams + n, sizeof(ip)))
|
||||
return -EFAULT;
|
||||
|
||||
/* All unused attribute bits has to be zero */
|
||||
if (ip.attr & ~TEE_IOCTL_PARAM_ATTR_TYPE_MASK)
|
||||
return -EINVAL;
|
||||
|
||||
params[n].attr = ip.attr;
|
||||
switch (ip.attr) {
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_NONE:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT:
|
||||
break;
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT:
|
||||
params[n].u.value.a = ip.a;
|
||||
params[n].u.value.b = ip.b;
|
||||
params[n].u.value.c = ip.c;
|
||||
break;
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
|
||||
/*
|
||||
* If we fail to get a pointer to a shared memory
|
||||
* object (and increase the ref count) from an
|
||||
* identifier we return an error. All pointers that
|
||||
* has been added in params have an increased ref
|
||||
* count. It's the callers responibility to do
|
||||
* tee_shm_put() on all resolved pointers.
|
||||
*/
|
||||
shm = tee_shm_get_from_id(ctx, ip.c);
|
||||
if (IS_ERR(shm))
|
||||
return PTR_ERR(shm);
|
||||
|
||||
params[n].u.memref.shm_offs = ip.a;
|
||||
params[n].u.memref.size = ip.b;
|
||||
params[n].u.memref.shm = shm;
|
||||
break;
|
||||
default:
|
||||
/* Unknown attribute */
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int params_to_user(struct tee_ioctl_param __user *uparams,
|
||||
size_t num_params, struct tee_param *params)
|
||||
{
|
||||
size_t n;
|
||||
|
||||
for (n = 0; n < num_params; n++) {
|
||||
struct tee_ioctl_param __user *up = uparams + n;
|
||||
struct tee_param *p = params + n;
|
||||
|
||||
switch (p->attr) {
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT:
|
||||
if (put_user(p->u.value.a, &up->a) ||
|
||||
put_user(p->u.value.b, &up->b) ||
|
||||
put_user(p->u.value.c, &up->c))
|
||||
return -EFAULT;
|
||||
break;
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
|
||||
if (put_user((u64)p->u.memref.size, &up->b))
|
||||
return -EFAULT;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static bool param_is_memref(struct tee_param *param)
|
||||
{
|
||||
switch (param->attr & TEE_IOCTL_PARAM_ATTR_TYPE_MASK) {
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
|
||||
return true;
|
||||
default:
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
static int tee_ioctl_open_session(struct tee_context *ctx,
|
||||
struct tee_ioctl_buf_data __user *ubuf)
|
||||
{
|
||||
int rc;
|
||||
size_t n;
|
||||
struct tee_ioctl_buf_data buf;
|
||||
struct tee_ioctl_open_session_arg __user *uarg;
|
||||
struct tee_ioctl_open_session_arg arg;
|
||||
struct tee_ioctl_param __user *uparams = NULL;
|
||||
struct tee_param *params = NULL;
|
||||
bool have_session = false;
|
||||
|
||||
if (!ctx->teedev->desc->ops->open_session)
|
||||
return -EINVAL;
|
||||
|
||||
if (copy_from_user(&buf, ubuf, sizeof(buf)))
|
||||
return -EFAULT;
|
||||
|
||||
if (buf.buf_len > TEE_MAX_ARG_SIZE ||
|
||||
buf.buf_len < sizeof(struct tee_ioctl_open_session_arg))
|
||||
return -EINVAL;
|
||||
|
||||
uarg = u64_to_user_ptr(buf.buf_ptr);
|
||||
if (copy_from_user(&arg, uarg, sizeof(arg)))
|
||||
return -EFAULT;
|
||||
|
||||
if (sizeof(arg) + TEE_IOCTL_PARAM_SIZE(arg.num_params) != buf.buf_len)
|
||||
return -EINVAL;
|
||||
|
||||
if (arg.num_params) {
|
||||
params = kcalloc(arg.num_params, sizeof(struct tee_param),
|
||||
GFP_KERNEL);
|
||||
if (!params)
|
||||
return -ENOMEM;
|
||||
uparams = uarg->params;
|
||||
rc = params_from_user(ctx, params, arg.num_params, uparams);
|
||||
if (rc)
|
||||
goto out;
|
||||
}
|
||||
|
||||
rc = ctx->teedev->desc->ops->open_session(ctx, &arg, params);
|
||||
if (rc)
|
||||
goto out;
|
||||
have_session = true;
|
||||
|
||||
if (put_user(arg.session, &uarg->session) ||
|
||||
put_user(arg.ret, &uarg->ret) ||
|
||||
put_user(arg.ret_origin, &uarg->ret_origin)) {
|
||||
rc = -EFAULT;
|
||||
goto out;
|
||||
}
|
||||
rc = params_to_user(uparams, arg.num_params, params);
|
||||
out:
|
||||
/*
|
||||
* If we've succeeded to open the session but failed to communicate
|
||||
* it back to user space, close the session again to avoid leakage.
|
||||
*/
|
||||
if (rc && have_session && ctx->teedev->desc->ops->close_session)
|
||||
ctx->teedev->desc->ops->close_session(ctx, arg.session);
|
||||
|
||||
if (params) {
|
||||
/* Decrease ref count for all valid shared memory pointers */
|
||||
for (n = 0; n < arg.num_params; n++)
|
||||
if (param_is_memref(params + n) &&
|
||||
params[n].u.memref.shm)
|
||||
tee_shm_put(params[n].u.memref.shm);
|
||||
kfree(params);
|
||||
}
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int tee_ioctl_invoke(struct tee_context *ctx,
|
||||
struct tee_ioctl_buf_data __user *ubuf)
|
||||
{
|
||||
int rc;
|
||||
size_t n;
|
||||
struct tee_ioctl_buf_data buf;
|
||||
struct tee_ioctl_invoke_arg __user *uarg;
|
||||
struct tee_ioctl_invoke_arg arg;
|
||||
struct tee_ioctl_param __user *uparams = NULL;
|
||||
struct tee_param *params = NULL;
|
||||
|
||||
if (!ctx->teedev->desc->ops->invoke_func)
|
||||
return -EINVAL;
|
||||
|
||||
if (copy_from_user(&buf, ubuf, sizeof(buf)))
|
||||
return -EFAULT;
|
||||
|
||||
if (buf.buf_len > TEE_MAX_ARG_SIZE ||
|
||||
buf.buf_len < sizeof(struct tee_ioctl_invoke_arg))
|
||||
return -EINVAL;
|
||||
|
||||
uarg = u64_to_user_ptr(buf.buf_ptr);
|
||||
if (copy_from_user(&arg, uarg, sizeof(arg)))
|
||||
return -EFAULT;
|
||||
|
||||
if (sizeof(arg) + TEE_IOCTL_PARAM_SIZE(arg.num_params) != buf.buf_len)
|
||||
return -EINVAL;
|
||||
|
||||
if (arg.num_params) {
|
||||
params = kcalloc(arg.num_params, sizeof(struct tee_param),
|
||||
GFP_KERNEL);
|
||||
if (!params)
|
||||
return -ENOMEM;
|
||||
uparams = uarg->params;
|
||||
rc = params_from_user(ctx, params, arg.num_params, uparams);
|
||||
if (rc)
|
||||
goto out;
|
||||
}
|
||||
|
||||
rc = ctx->teedev->desc->ops->invoke_func(ctx, &arg, params);
|
||||
if (rc)
|
||||
goto out;
|
||||
|
||||
if (put_user(arg.ret, &uarg->ret) ||
|
||||
put_user(arg.ret_origin, &uarg->ret_origin)) {
|
||||
rc = -EFAULT;
|
||||
goto out;
|
||||
}
|
||||
rc = params_to_user(uparams, arg.num_params, params);
|
||||
out:
|
||||
if (params) {
|
||||
/* Decrease ref count for all valid shared memory pointers */
|
||||
for (n = 0; n < arg.num_params; n++)
|
||||
if (param_is_memref(params + n) &&
|
||||
params[n].u.memref.shm)
|
||||
tee_shm_put(params[n].u.memref.shm);
|
||||
kfree(params);
|
||||
}
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int tee_ioctl_cancel(struct tee_context *ctx,
|
||||
struct tee_ioctl_cancel_arg __user *uarg)
|
||||
{
|
||||
struct tee_ioctl_cancel_arg arg;
|
||||
|
||||
if (!ctx->teedev->desc->ops->cancel_req)
|
||||
return -EINVAL;
|
||||
|
||||
if (copy_from_user(&arg, uarg, sizeof(arg)))
|
||||
return -EFAULT;
|
||||
|
||||
return ctx->teedev->desc->ops->cancel_req(ctx, arg.cancel_id,
|
||||
arg.session);
|
||||
}
|
||||
|
||||
static int
|
||||
tee_ioctl_close_session(struct tee_context *ctx,
|
||||
struct tee_ioctl_close_session_arg __user *uarg)
|
||||
{
|
||||
struct tee_ioctl_close_session_arg arg;
|
||||
|
||||
if (!ctx->teedev->desc->ops->close_session)
|
||||
return -EINVAL;
|
||||
|
||||
if (copy_from_user(&arg, uarg, sizeof(arg)))
|
||||
return -EFAULT;
|
||||
|
||||
return ctx->teedev->desc->ops->close_session(ctx, arg.session);
|
||||
}
|
||||
|
||||
static int params_to_supp(struct tee_context *ctx,
|
||||
struct tee_ioctl_param __user *uparams,
|
||||
size_t num_params, struct tee_param *params)
|
||||
{
|
||||
size_t n;
|
||||
|
||||
for (n = 0; n < num_params; n++) {
|
||||
struct tee_ioctl_param ip;
|
||||
struct tee_param *p = params + n;
|
||||
|
||||
ip.attr = p->attr & TEE_IOCTL_PARAM_ATTR_TYPE_MASK;
|
||||
switch (p->attr) {
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT:
|
||||
ip.a = p->u.value.a;
|
||||
ip.b = p->u.value.b;
|
||||
ip.c = p->u.value.c;
|
||||
break;
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
|
||||
ip.b = p->u.memref.size;
|
||||
if (!p->u.memref.shm) {
|
||||
ip.a = 0;
|
||||
ip.c = (u64)-1; /* invalid shm id */
|
||||
break;
|
||||
}
|
||||
ip.a = p->u.memref.shm_offs;
|
||||
ip.c = p->u.memref.shm->id;
|
||||
break;
|
||||
default:
|
||||
ip.a = 0;
|
||||
ip.b = 0;
|
||||
ip.c = 0;
|
||||
break;
|
||||
}
|
||||
|
||||
if (copy_to_user(uparams + n, &ip, sizeof(ip)))
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tee_ioctl_supp_recv(struct tee_context *ctx,
|
||||
struct tee_ioctl_buf_data __user *ubuf)
|
||||
{
|
||||
int rc;
|
||||
struct tee_ioctl_buf_data buf;
|
||||
struct tee_iocl_supp_recv_arg __user *uarg;
|
||||
struct tee_param *params;
|
||||
u32 num_params;
|
||||
u32 func;
|
||||
|
||||
if (!ctx->teedev->desc->ops->supp_recv)
|
||||
return -EINVAL;
|
||||
|
||||
if (copy_from_user(&buf, ubuf, sizeof(buf)))
|
||||
return -EFAULT;
|
||||
|
||||
if (buf.buf_len > TEE_MAX_ARG_SIZE ||
|
||||
buf.buf_len < sizeof(struct tee_iocl_supp_recv_arg))
|
||||
return -EINVAL;
|
||||
|
||||
uarg = u64_to_user_ptr(buf.buf_ptr);
|
||||
if (get_user(num_params, &uarg->num_params))
|
||||
return -EFAULT;
|
||||
|
||||
if (sizeof(*uarg) + TEE_IOCTL_PARAM_SIZE(num_params) != buf.buf_len)
|
||||
return -EINVAL;
|
||||
|
||||
params = kcalloc(num_params, sizeof(struct tee_param), GFP_KERNEL);
|
||||
if (!params)
|
||||
return -ENOMEM;
|
||||
|
||||
rc = ctx->teedev->desc->ops->supp_recv(ctx, &func, &num_params, params);
|
||||
if (rc)
|
||||
goto out;
|
||||
|
||||
if (put_user(func, &uarg->func) ||
|
||||
put_user(num_params, &uarg->num_params)) {
|
||||
rc = -EFAULT;
|
||||
goto out;
|
||||
}
|
||||
|
||||
rc = params_to_supp(ctx, uarg->params, num_params, params);
|
||||
out:
|
||||
kfree(params);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static int params_from_supp(struct tee_param *params, size_t num_params,
|
||||
struct tee_ioctl_param __user *uparams)
|
||||
{
|
||||
size_t n;
|
||||
|
||||
for (n = 0; n < num_params; n++) {
|
||||
struct tee_param *p = params + n;
|
||||
struct tee_ioctl_param ip;
|
||||
|
||||
if (copy_from_user(&ip, uparams + n, sizeof(ip)))
|
||||
return -EFAULT;
|
||||
|
||||
/* All unused attribute bits has to be zero */
|
||||
if (ip.attr & ~TEE_IOCTL_PARAM_ATTR_TYPE_MASK)
|
||||
return -EINVAL;
|
||||
|
||||
p->attr = ip.attr;
|
||||
switch (ip.attr) {
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT:
|
||||
/* Only out and in/out values can be updated */
|
||||
p->u.value.a = ip.a;
|
||||
p->u.value.b = ip.b;
|
||||
p->u.value.c = ip.c;
|
||||
break;
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT:
|
||||
case TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT:
|
||||
/*
|
||||
* Only the size of the memref can be updated.
|
||||
* Since we don't have access to the original
|
||||
* parameters here, only store the supplied size.
|
||||
* The driver will copy the updated size into the
|
||||
* original parameters.
|
||||
*/
|
||||
p->u.memref.shm = NULL;
|
||||
p->u.memref.shm_offs = 0;
|
||||
p->u.memref.size = ip.b;
|
||||
break;
|
||||
default:
|
||||
memset(&p->u, 0, sizeof(p->u));
|
||||
break;
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int tee_ioctl_supp_send(struct tee_context *ctx,
|
||||
struct tee_ioctl_buf_data __user *ubuf)
|
||||
{
|
||||
long rc;
|
||||
struct tee_ioctl_buf_data buf;
|
||||
struct tee_iocl_supp_send_arg __user *uarg;
|
||||
struct tee_param *params;
|
||||
u32 num_params;
|
||||
u32 ret;
|
||||
|
||||
/* Not valid for this driver */
|
||||
if (!ctx->teedev->desc->ops->supp_send)
|
||||
return -EINVAL;
|
||||
|
||||
if (copy_from_user(&buf, ubuf, sizeof(buf)))
|
||||
return -EFAULT;
|
||||
|
||||
if (buf.buf_len > TEE_MAX_ARG_SIZE ||
|
||||
buf.buf_len < sizeof(struct tee_iocl_supp_send_arg))
|
||||
return -EINVAL;
|
||||
|
||||
uarg = u64_to_user_ptr(buf.buf_ptr);
|
||||
if (get_user(ret, &uarg->ret) ||
|
||||
get_user(num_params, &uarg->num_params))
|
||||
return -EFAULT;
|
||||
|
||||
if (sizeof(*uarg) + TEE_IOCTL_PARAM_SIZE(num_params) > buf.buf_len)
|
||||
return -EINVAL;
|
||||
|
||||
params = kcalloc(num_params, sizeof(struct tee_param), GFP_KERNEL);
|
||||
if (!params)
|
||||
return -ENOMEM;
|
||||
|
||||
rc = params_from_supp(params, num_params, uarg->params);
|
||||
if (rc)
|
||||
goto out;
|
||||
|
||||
rc = ctx->teedev->desc->ops->supp_send(ctx, ret, num_params, params);
|
||||
out:
|
||||
kfree(params);
|
||||
return rc;
|
||||
}
|
||||
|
||||
static long tee_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
|
||||
{
|
||||
struct tee_context *ctx = filp->private_data;
|
||||
void __user *uarg = (void __user *)arg;
|
||||
|
||||
switch (cmd) {
|
||||
case TEE_IOC_VERSION:
|
||||
return tee_ioctl_version(ctx, uarg);
|
||||
case TEE_IOC_SHM_ALLOC:
|
||||
return tee_ioctl_shm_alloc(ctx, uarg);
|
||||
case TEE_IOC_OPEN_SESSION:
|
||||
return tee_ioctl_open_session(ctx, uarg);
|
||||
case TEE_IOC_INVOKE:
|
||||
return tee_ioctl_invoke(ctx, uarg);
|
||||
case TEE_IOC_CANCEL:
|
||||
return tee_ioctl_cancel(ctx, uarg);
|
||||
case TEE_IOC_CLOSE_SESSION:
|
||||
return tee_ioctl_close_session(ctx, uarg);
|
||||
case TEE_IOC_SUPPL_RECV:
|
||||
return tee_ioctl_supp_recv(ctx, uarg);
|
||||
case TEE_IOC_SUPPL_SEND:
|
||||
return tee_ioctl_supp_send(ctx, uarg);
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
}
|
||||
|
||||
static const struct file_operations tee_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = tee_open,
|
||||
.release = tee_release,
|
||||
.unlocked_ioctl = tee_ioctl,
|
||||
.compat_ioctl = tee_ioctl,
|
||||
};
|
||||
|
||||
static void tee_release_device(struct device *dev)
|
||||
{
|
||||
struct tee_device *teedev = container_of(dev, struct tee_device, dev);
|
||||
|
||||
spin_lock(&driver_lock);
|
||||
clear_bit(teedev->id, dev_mask);
|
||||
spin_unlock(&driver_lock);
|
||||
mutex_destroy(&teedev->mutex);
|
||||
idr_destroy(&teedev->idr);
|
||||
kfree(teedev);
|
||||
}
|
||||
|
||||
/**
|
||||
* tee_device_alloc() - Allocate a new struct tee_device instance
|
||||
* @teedesc: Descriptor for this driver
|
||||
* @dev: Parent device for this device
|
||||
* @pool: Shared memory pool, NULL if not used
|
||||
* @driver_data: Private driver data for this device
|
||||
*
|
||||
* Allocates a new struct tee_device instance. The device is
|
||||
* removed by tee_device_unregister().
|
||||
*
|
||||
* @returns a pointer to a 'struct tee_device' or an ERR_PTR on failure
|
||||
*/
|
||||
struct tee_device *tee_device_alloc(const struct tee_desc *teedesc,
|
||||
struct device *dev,
|
||||
struct tee_shm_pool *pool,
|
||||
void *driver_data)
|
||||
{
|
||||
struct tee_device *teedev;
|
||||
void *ret;
|
||||
int rc;
|
||||
int offs = 0;
|
||||
|
||||
if (!teedesc || !teedesc->name || !teedesc->ops ||
|
||||
!teedesc->ops->get_version || !teedesc->ops->open ||
|
||||
!teedesc->ops->release || !pool)
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
teedev = kzalloc(sizeof(*teedev), GFP_KERNEL);
|
||||
if (!teedev) {
|
||||
ret = ERR_PTR(-ENOMEM);
|
||||
goto err;
|
||||
}
|
||||
|
||||
if (teedesc->flags & TEE_DESC_PRIVILEGED)
|
||||
offs = TEE_NUM_DEVICES / 2;
|
||||
|
||||
spin_lock(&driver_lock);
|
||||
teedev->id = find_next_zero_bit(dev_mask, TEE_NUM_DEVICES, offs);
|
||||
if (teedev->id < TEE_NUM_DEVICES)
|
||||
set_bit(teedev->id, dev_mask);
|
||||
spin_unlock(&driver_lock);
|
||||
|
||||
if (teedev->id >= TEE_NUM_DEVICES) {
|
||||
ret = ERR_PTR(-ENOMEM);
|
||||
goto err;
|
||||
}
|
||||
|
||||
snprintf(teedev->name, sizeof(teedev->name), "tee%s%d",
|
||||
teedesc->flags & TEE_DESC_PRIVILEGED ? "priv" : "",
|
||||
teedev->id - offs);
|
||||
|
||||
teedev->dev.class = tee_class;
|
||||
teedev->dev.release = tee_release_device;
|
||||
teedev->dev.parent = dev;
|
||||
|
||||
teedev->dev.devt = MKDEV(MAJOR(tee_devt), teedev->id);
|
||||
|
||||
rc = dev_set_name(&teedev->dev, "%s", teedev->name);
|
||||
if (rc) {
|
||||
ret = ERR_PTR(rc);
|
||||
goto err_devt;
|
||||
}
|
||||
|
||||
cdev_init(&teedev->cdev, &tee_fops);
|
||||
teedev->cdev.owner = teedesc->owner;
|
||||
teedev->cdev.kobj.parent = &teedev->dev.kobj;
|
||||
|
||||
dev_set_drvdata(&teedev->dev, driver_data);
|
||||
device_initialize(&teedev->dev);
|
||||
|
||||
/* 1 as tee_device_unregister() does one final tee_device_put() */
|
||||
teedev->num_users = 1;
|
||||
init_completion(&teedev->c_no_users);
|
||||
mutex_init(&teedev->mutex);
|
||||
idr_init(&teedev->idr);
|
||||
|
||||
teedev->desc = teedesc;
|
||||
teedev->pool = pool;
|
||||
|
||||
return teedev;
|
||||
err_devt:
|
||||
unregister_chrdev_region(teedev->dev.devt, 1);
|
||||
err:
|
||||
pr_err("could not register %s driver\n",
|
||||
teedesc->flags & TEE_DESC_PRIVILEGED ? "privileged" : "client");
|
||||
if (teedev && teedev->id < TEE_NUM_DEVICES) {
|
||||
spin_lock(&driver_lock);
|
||||
clear_bit(teedev->id, dev_mask);
|
||||
spin_unlock(&driver_lock);
|
||||
}
|
||||
kfree(teedev);
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tee_device_alloc);
|
||||
|
||||
static ssize_t implementation_id_show(struct device *dev,
|
||||
struct device_attribute *attr, char *buf)
|
||||
{
|
||||
struct tee_device *teedev = container_of(dev, struct tee_device, dev);
|
||||
struct tee_ioctl_version_data vers;
|
||||
|
||||
teedev->desc->ops->get_version(teedev, &vers);
|
||||
return scnprintf(buf, PAGE_SIZE, "%d\n", vers.impl_id);
|
||||
}
|
||||
static DEVICE_ATTR_RO(implementation_id);
|
||||
|
||||
static struct attribute *tee_dev_attrs[] = {
|
||||
&dev_attr_implementation_id.attr,
|
||||
NULL
|
||||
};
|
||||
|
||||
static const struct attribute_group tee_dev_group = {
|
||||
.attrs = tee_dev_attrs,
|
||||
};
|
||||
|
||||
/**
|
||||
* tee_device_register() - Registers a TEE device
|
||||
* @teedev: Device to register
|
||||
*
|
||||
* tee_device_unregister() need to be called to remove the @teedev if
|
||||
* this function fails.
|
||||
*
|
||||
* @returns < 0 on failure
|
||||
*/
|
||||
int tee_device_register(struct tee_device *teedev)
|
||||
{
|
||||
int rc;
|
||||
|
||||
if (teedev->flags & TEE_DEVICE_FLAG_REGISTERED) {
|
||||
dev_err(&teedev->dev, "attempt to register twice\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
rc = cdev_add(&teedev->cdev, teedev->dev.devt, 1);
|
||||
if (rc) {
|
||||
dev_err(&teedev->dev,
|
||||
"unable to cdev_add() %s, major %d, minor %d, err=%d\n",
|
||||
teedev->name, MAJOR(teedev->dev.devt),
|
||||
MINOR(teedev->dev.devt), rc);
|
||||
return rc;
|
||||
}
|
||||
|
||||
rc = device_add(&teedev->dev);
|
||||
if (rc) {
|
||||
dev_err(&teedev->dev,
|
||||
"unable to device_add() %s, major %d, minor %d, err=%d\n",
|
||||
teedev->name, MAJOR(teedev->dev.devt),
|
||||
MINOR(teedev->dev.devt), rc);
|
||||
goto err_device_add;
|
||||
}
|
||||
|
||||
rc = sysfs_create_group(&teedev->dev.kobj, &tee_dev_group);
|
||||
if (rc) {
|
||||
dev_err(&teedev->dev,
|
||||
"failed to create sysfs attributes, err=%d\n", rc);
|
||||
goto err_sysfs_create_group;
|
||||
}
|
||||
|
||||
teedev->flags |= TEE_DEVICE_FLAG_REGISTERED;
|
||||
return 0;
|
||||
|
||||
err_sysfs_create_group:
|
||||
device_del(&teedev->dev);
|
||||
err_device_add:
|
||||
cdev_del(&teedev->cdev);
|
||||
return rc;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tee_device_register);
|
||||
|
||||
void tee_device_put(struct tee_device *teedev)
|
||||
{
|
||||
mutex_lock(&teedev->mutex);
|
||||
/* Shouldn't put in this state */
|
||||
if (!WARN_ON(!teedev->desc)) {
|
||||
teedev->num_users--;
|
||||
if (!teedev->num_users) {
|
||||
teedev->desc = NULL;
|
||||
complete(&teedev->c_no_users);
|
||||
}
|
||||
}
|
||||
mutex_unlock(&teedev->mutex);
|
||||
}
|
||||
|
||||
bool tee_device_get(struct tee_device *teedev)
|
||||
{
|
||||
mutex_lock(&teedev->mutex);
|
||||
if (!teedev->desc) {
|
||||
mutex_unlock(&teedev->mutex);
|
||||
return false;
|
||||
}
|
||||
teedev->num_users++;
|
||||
mutex_unlock(&teedev->mutex);
|
||||
return true;
|
||||
}
|
||||
|
||||
/**
|
||||
* tee_device_unregister() - Removes a TEE device
|
||||
* @teedev: Device to unregister
|
||||
*
|
||||
* This function should be called to remove the @teedev even if
|
||||
* tee_device_register() hasn't been called yet. Does nothing if
|
||||
* @teedev is NULL.
|
||||
*/
|
||||
void tee_device_unregister(struct tee_device *teedev)
|
||||
{
|
||||
if (!teedev)
|
||||
return;
|
||||
|
||||
if (teedev->flags & TEE_DEVICE_FLAG_REGISTERED) {
|
||||
sysfs_remove_group(&teedev->dev.kobj, &tee_dev_group);
|
||||
cdev_del(&teedev->cdev);
|
||||
device_del(&teedev->dev);
|
||||
}
|
||||
|
||||
tee_device_put(teedev);
|
||||
wait_for_completion(&teedev->c_no_users);
|
||||
|
||||
/*
|
||||
* No need to take a mutex any longer now since teedev->desc was
|
||||
* set to NULL before teedev->c_no_users was completed.
|
||||
*/
|
||||
|
||||
teedev->pool = NULL;
|
||||
|
||||
put_device(&teedev->dev);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tee_device_unregister);
|
||||
|
||||
/**
|
||||
* tee_get_drvdata() - Return driver_data pointer
|
||||
* @teedev: Device containing the driver_data pointer
|
||||
* @returns the driver_data pointer supplied to tee_register().
|
||||
*/
|
||||
void *tee_get_drvdata(struct tee_device *teedev)
|
||||
{
|
||||
return dev_get_drvdata(&teedev->dev);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tee_get_drvdata);
|
||||
|
||||
static int __init tee_init(void)
|
||||
{
|
||||
int rc;
|
||||
|
||||
tee_class = class_create(THIS_MODULE, "tee");
|
||||
if (IS_ERR(tee_class)) {
|
||||
pr_err("couldn't create class\n");
|
||||
return PTR_ERR(tee_class);
|
||||
}
|
||||
|
||||
rc = alloc_chrdev_region(&tee_devt, 0, TEE_NUM_DEVICES, "tee");
|
||||
if (rc) {
|
||||
pr_err("failed to allocate char dev region\n");
|
||||
class_destroy(tee_class);
|
||||
tee_class = NULL;
|
||||
}
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
||||
static void __exit tee_exit(void)
|
||||
{
|
||||
class_destroy(tee_class);
|
||||
tee_class = NULL;
|
||||
unregister_chrdev_region(tee_devt, TEE_NUM_DEVICES);
|
||||
}
|
||||
|
||||
subsys_initcall(tee_init);
|
||||
module_exit(tee_exit);
|
||||
|
||||
MODULE_AUTHOR("Linaro");
|
||||
MODULE_DESCRIPTION("TEE Driver");
|
||||
MODULE_VERSION("1.0");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
129
drivers/tee/tee_private.h
Normal file
129
drivers/tee/tee_private.h
Normal file
@ -0,0 +1,129 @@
|
||||
/*
|
||||
* Copyright (c) 2015-2016, Linaro Limited
|
||||
*
|
||||
* This software is licensed under the terms of the GNU General Public
|
||||
* License version 2, as published by the Free Software Foundation, and
|
||||
* may be copied, distributed, and modified under those terms.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
*/
|
||||
#ifndef TEE_PRIVATE_H
|
||||
#define TEE_PRIVATE_H
|
||||
|
||||
#include <linux/cdev.h>
|
||||
#include <linux/completion.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/kref.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/types.h>
|
||||
|
||||
struct tee_device;
|
||||
|
||||
/**
|
||||
* struct tee_shm - shared memory object
|
||||
* @teedev: device used to allocate the object
|
||||
* @ctx: context using the object, if NULL the context is gone
|
||||
* @link link element
|
||||
* @paddr: physical address of the shared memory
|
||||
* @kaddr: virtual address of the shared memory
|
||||
* @size: size of shared memory
|
||||
* @dmabuf: dmabuf used to for exporting to user space
|
||||
* @flags: defined by TEE_SHM_* in tee_drv.h
|
||||
* @id: unique id of a shared memory object on this device
|
||||
*/
|
||||
struct tee_shm {
|
||||
struct tee_device *teedev;
|
||||
struct tee_context *ctx;
|
||||
struct list_head link;
|
||||
phys_addr_t paddr;
|
||||
void *kaddr;
|
||||
size_t size;
|
||||
struct dma_buf *dmabuf;
|
||||
u32 flags;
|
||||
int id;
|
||||
};
|
||||
|
||||
struct tee_shm_pool_mgr;
|
||||
|
||||
/**
|
||||
* struct tee_shm_pool_mgr_ops - shared memory pool manager operations
|
||||
* @alloc: called when allocating shared memory
|
||||
* @free: called when freeing shared memory
|
||||
*/
|
||||
struct tee_shm_pool_mgr_ops {
|
||||
int (*alloc)(struct tee_shm_pool_mgr *poolmgr, struct tee_shm *shm,
|
||||
size_t size);
|
||||
void (*free)(struct tee_shm_pool_mgr *poolmgr, struct tee_shm *shm);
|
||||
};
|
||||
|
||||
/**
|
||||
* struct tee_shm_pool_mgr - shared memory manager
|
||||
* @ops: operations
|
||||
* @private_data: private data for the shared memory manager
|
||||
*/
|
||||
struct tee_shm_pool_mgr {
|
||||
const struct tee_shm_pool_mgr_ops *ops;
|
||||
void *private_data;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct tee_shm_pool - shared memory pool
|
||||
* @private_mgr: pool manager for shared memory only between kernel
|
||||
* and secure world
|
||||
* @dma_buf_mgr: pool manager for shared memory exported to user space
|
||||
* @destroy: called when destroying the pool
|
||||
* @private_data: private data for the pool
|
||||
*/
|
||||
struct tee_shm_pool {
|
||||
struct tee_shm_pool_mgr private_mgr;
|
||||
struct tee_shm_pool_mgr dma_buf_mgr;
|
||||
void (*destroy)(struct tee_shm_pool *pool);
|
||||
void *private_data;
|
||||
};
|
||||
|
||||
#define TEE_DEVICE_FLAG_REGISTERED 0x1
|
||||
#define TEE_MAX_DEV_NAME_LEN 32
|
||||
|
||||
/**
|
||||
* struct tee_device - TEE Device representation
|
||||
* @name: name of device
|
||||
* @desc: description of device
|
||||
* @id: unique id of device
|
||||
* @flags: represented by TEE_DEVICE_FLAG_REGISTERED above
|
||||
* @dev: embedded basic device structure
|
||||
* @cdev: embedded cdev
|
||||
* @num_users: number of active users of this device
|
||||
* @c_no_user: completion used when unregistering the device
|
||||
* @mutex: mutex protecting @num_users and @idr
|
||||
* @idr: register of shared memory object allocated on this device
|
||||
* @pool: shared memory pool
|
||||
*/
|
||||
struct tee_device {
|
||||
char name[TEE_MAX_DEV_NAME_LEN];
|
||||
const struct tee_desc *desc;
|
||||
int id;
|
||||
unsigned int flags;
|
||||
|
||||
struct device dev;
|
||||
struct cdev cdev;
|
||||
|
||||
size_t num_users;
|
||||
struct completion c_no_users;
|
||||
struct mutex mutex; /* protects num_users and idr */
|
||||
|
||||
struct idr idr;
|
||||
struct tee_shm_pool *pool;
|
||||
};
|
||||
|
||||
int tee_shm_init(void);
|
||||
|
||||
int tee_shm_get_fd(struct tee_shm *shm);
|
||||
|
||||
bool tee_device_get(struct tee_device *teedev);
|
||||
void tee_device_put(struct tee_device *teedev);
|
||||
|
||||
#endif /*TEE_PRIVATE_H*/
|
||||
358
drivers/tee/tee_shm.c
Normal file
358
drivers/tee/tee_shm.c
Normal file
@ -0,0 +1,358 @@
|
||||
/*
|
||||
* Copyright (c) 2015-2016, Linaro Limited
|
||||
*
|
||||
* This software is licensed under the terms of the GNU General Public
|
||||
* License version 2, as published by the Free Software Foundation, and
|
||||
* may be copied, distributed, and modified under those terms.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
*/
|
||||
#include <linux/device.h>
|
||||
#include <linux/dma-buf.h>
|
||||
#include <linux/fdtable.h>
|
||||
#include <linux/idr.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/tee_drv.h>
|
||||
#include "tee_private.h"
|
||||
|
||||
static void tee_shm_release(struct tee_shm *shm)
|
||||
{
|
||||
struct tee_device *teedev = shm->teedev;
|
||||
struct tee_shm_pool_mgr *poolm;
|
||||
|
||||
mutex_lock(&teedev->mutex);
|
||||
idr_remove(&teedev->idr, shm->id);
|
||||
if (shm->ctx)
|
||||
list_del(&shm->link);
|
||||
mutex_unlock(&teedev->mutex);
|
||||
|
||||
if (shm->flags & TEE_SHM_DMA_BUF)
|
||||
poolm = &teedev->pool->dma_buf_mgr;
|
||||
else
|
||||
poolm = &teedev->pool->private_mgr;
|
||||
|
||||
poolm->ops->free(poolm, shm);
|
||||
kfree(shm);
|
||||
|
||||
tee_device_put(teedev);
|
||||
}
|
||||
|
||||
static struct sg_table *tee_shm_op_map_dma_buf(struct dma_buf_attachment
|
||||
*attach, enum dma_data_direction dir)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static void tee_shm_op_unmap_dma_buf(struct dma_buf_attachment *attach,
|
||||
struct sg_table *table,
|
||||
enum dma_data_direction dir)
|
||||
{
|
||||
}
|
||||
|
||||
static void tee_shm_op_release(struct dma_buf *dmabuf)
|
||||
{
|
||||
struct tee_shm *shm = dmabuf->priv;
|
||||
|
||||
tee_shm_release(shm);
|
||||
}
|
||||
|
||||
static void *tee_shm_op_kmap_atomic(struct dma_buf *dmabuf, unsigned long pgnum)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static void *tee_shm_op_kmap(struct dma_buf *dmabuf, unsigned long pgnum)
|
||||
{
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static int tee_shm_op_mmap(struct dma_buf *dmabuf, struct vm_area_struct *vma)
|
||||
{
|
||||
struct tee_shm *shm = dmabuf->priv;
|
||||
size_t size = vma->vm_end - vma->vm_start;
|
||||
|
||||
return remap_pfn_range(vma, vma->vm_start, shm->paddr >> PAGE_SHIFT,
|
||||
size, vma->vm_page_prot);
|
||||
}
|
||||
|
||||
static struct dma_buf_ops tee_shm_dma_buf_ops = {
|
||||
.map_dma_buf = tee_shm_op_map_dma_buf,
|
||||
.unmap_dma_buf = tee_shm_op_unmap_dma_buf,
|
||||
.release = tee_shm_op_release,
|
||||
.kmap_atomic = tee_shm_op_kmap_atomic,
|
||||
.kmap = tee_shm_op_kmap,
|
||||
.mmap = tee_shm_op_mmap,
|
||||
};
|
||||
|
||||
/**
|
||||
* tee_shm_alloc() - Allocate shared memory
|
||||
* @ctx: Context that allocates the shared memory
|
||||
* @size: Requested size of shared memory
|
||||
* @flags: Flags setting properties for the requested shared memory.
|
||||
*
|
||||
* Memory allocated as global shared memory is automatically freed when the
|
||||
* TEE file pointer is closed. The @flags field uses the bits defined by
|
||||
* TEE_SHM_* in <linux/tee_drv.h>. TEE_SHM_MAPPED must currently always be
|
||||
* set. If TEE_SHM_DMA_BUF global shared memory will be allocated and
|
||||
* associated with a dma-buf handle, else driver private memory.
|
||||
*/
|
||||
struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags)
|
||||
{
|
||||
struct tee_device *teedev = ctx->teedev;
|
||||
struct tee_shm_pool_mgr *poolm = NULL;
|
||||
struct tee_shm *shm;
|
||||
void *ret;
|
||||
int rc;
|
||||
|
||||
if (!(flags & TEE_SHM_MAPPED)) {
|
||||
dev_err(teedev->dev.parent,
|
||||
"only mapped allocations supported\n");
|
||||
return ERR_PTR(-EINVAL);
|
||||
}
|
||||
|
||||
if ((flags & ~(TEE_SHM_MAPPED | TEE_SHM_DMA_BUF))) {
|
||||
dev_err(teedev->dev.parent, "invalid shm flags 0x%x", flags);
|
||||
return ERR_PTR(-EINVAL);
|
||||
}
|
||||
|
||||
if (!tee_device_get(teedev))
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
if (!teedev->pool) {
|
||||
/* teedev has been detached from driver */
|
||||
ret = ERR_PTR(-EINVAL);
|
||||
goto err_dev_put;
|
||||
}
|
||||
|
||||
shm = kzalloc(sizeof(*shm), GFP_KERNEL);
|
||||
if (!shm) {
|
||||
ret = ERR_PTR(-ENOMEM);
|
||||
goto err_dev_put;
|
||||
}
|
||||
|
||||
shm->flags = flags;
|
||||
shm->teedev = teedev;
|
||||
shm->ctx = ctx;
|
||||
if (flags & TEE_SHM_DMA_BUF)
|
||||
poolm = &teedev->pool->dma_buf_mgr;
|
||||
else
|
||||
poolm = &teedev->pool->private_mgr;
|
||||
|
||||
rc = poolm->ops->alloc(poolm, shm, size);
|
||||
if (rc) {
|
||||
ret = ERR_PTR(rc);
|
||||
goto err_kfree;
|
||||
}
|
||||
|
||||
mutex_lock(&teedev->mutex);
|
||||
shm->id = idr_alloc(&teedev->idr, shm, 1, 0, GFP_KERNEL);
|
||||
mutex_unlock(&teedev->mutex);
|
||||
if (shm->id < 0) {
|
||||
ret = ERR_PTR(shm->id);
|
||||
goto err_pool_free;
|
||||
}
|
||||
|
||||
if (flags & TEE_SHM_DMA_BUF) {
|
||||
DEFINE_DMA_BUF_EXPORT_INFO(exp_info);
|
||||
|
||||
exp_info.ops = &tee_shm_dma_buf_ops;
|
||||
exp_info.size = shm->size;
|
||||
exp_info.flags = O_RDWR;
|
||||
exp_info.priv = shm;
|
||||
|
||||
shm->dmabuf = dma_buf_export(&exp_info);
|
||||
if (IS_ERR(shm->dmabuf)) {
|
||||
ret = ERR_CAST(shm->dmabuf);
|
||||
goto err_rem;
|
||||
}
|
||||
}
|
||||
mutex_lock(&teedev->mutex);
|
||||
list_add_tail(&shm->link, &ctx->list_shm);
|
||||
mutex_unlock(&teedev->mutex);
|
||||
|
||||
return shm;
|
||||
err_rem:
|
||||
mutex_lock(&teedev->mutex);
|
||||
idr_remove(&teedev->idr, shm->id);
|
||||
mutex_unlock(&teedev->mutex);
|
||||
err_pool_free:
|
||||
poolm->ops->free(poolm, shm);
|
||||
err_kfree:
|
||||
kfree(shm);
|
||||
err_dev_put:
|
||||
tee_device_put(teedev);
|
||||
return ret;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tee_shm_alloc);
|
||||
|
||||
/**
|
||||
* tee_shm_get_fd() - Increase reference count and return file descriptor
|
||||
* @shm: Shared memory handle
|
||||
* @returns user space file descriptor to shared memory
|
||||
*/
|
||||
int tee_shm_get_fd(struct tee_shm *shm)
|
||||
{
|
||||
u32 req_flags = TEE_SHM_MAPPED | TEE_SHM_DMA_BUF;
|
||||
int fd;
|
||||
|
||||
if ((shm->flags & req_flags) != req_flags)
|
||||
return -EINVAL;
|
||||
|
||||
fd = dma_buf_fd(shm->dmabuf, O_CLOEXEC);
|
||||
if (fd >= 0)
|
||||
get_dma_buf(shm->dmabuf);
|
||||
return fd;
|
||||
}
|
||||
|
||||
/**
|
||||
* tee_shm_free() - Free shared memory
|
||||
* @shm: Handle to shared memory to free
|
||||
*/
|
||||
void tee_shm_free(struct tee_shm *shm)
|
||||
{
|
||||
/*
|
||||
* dma_buf_put() decreases the dmabuf reference counter and will
|
||||
* call tee_shm_release() when the last reference is gone.
|
||||
*
|
||||
* In the case of driver private memory we call tee_shm_release
|
||||
* directly instead as it doesn't have a reference counter.
|
||||
*/
|
||||
if (shm->flags & TEE_SHM_DMA_BUF)
|
||||
dma_buf_put(shm->dmabuf);
|
||||
else
|
||||
tee_shm_release(shm);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tee_shm_free);
|
||||
|
||||
/**
|
||||
* tee_shm_va2pa() - Get physical address of a virtual address
|
||||
* @shm: Shared memory handle
|
||||
* @va: Virtual address to tranlsate
|
||||
* @pa: Returned physical address
|
||||
* @returns 0 on success and < 0 on failure
|
||||
*/
|
||||
int tee_shm_va2pa(struct tee_shm *shm, void *va, phys_addr_t *pa)
|
||||
{
|
||||
/* Check that we're in the range of the shm */
|
||||
if ((char *)va < (char *)shm->kaddr)
|
||||
return -EINVAL;
|
||||
if ((char *)va >= ((char *)shm->kaddr + shm->size))
|
||||
return -EINVAL;
|
||||
|
||||
return tee_shm_get_pa(
|
||||
shm, (unsigned long)va - (unsigned long)shm->kaddr, pa);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tee_shm_va2pa);
|
||||
|
||||
/**
|
||||
* tee_shm_pa2va() - Get virtual address of a physical address
|
||||
* @shm: Shared memory handle
|
||||
* @pa: Physical address to tranlsate
|
||||
* @va: Returned virtual address
|
||||
* @returns 0 on success and < 0 on failure
|
||||
*/
|
||||
int tee_shm_pa2va(struct tee_shm *shm, phys_addr_t pa, void **va)
|
||||
{
|
||||
/* Check that we're in the range of the shm */
|
||||
if (pa < shm->paddr)
|
||||
return -EINVAL;
|
||||
if (pa >= (shm->paddr + shm->size))
|
||||
return -EINVAL;
|
||||
|
||||
if (va) {
|
||||
void *v = tee_shm_get_va(shm, pa - shm->paddr);
|
||||
|
||||
if (IS_ERR(v))
|
||||
return PTR_ERR(v);
|
||||
*va = v;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tee_shm_pa2va);
|
||||
|
||||
/**
|
||||
* tee_shm_get_va() - Get virtual address of a shared memory plus an offset
|
||||
* @shm: Shared memory handle
|
||||
* @offs: Offset from start of this shared memory
|
||||
* @returns virtual address of the shared memory + offs if offs is within
|
||||
* the bounds of this shared memory, else an ERR_PTR
|
||||
*/
|
||||
void *tee_shm_get_va(struct tee_shm *shm, size_t offs)
|
||||
{
|
||||
if (offs >= shm->size)
|
||||
return ERR_PTR(-EINVAL);
|
||||
return (char *)shm->kaddr + offs;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tee_shm_get_va);
|
||||
|
||||
/**
|
||||
* tee_shm_get_pa() - Get physical address of a shared memory plus an offset
|
||||
* @shm: Shared memory handle
|
||||
* @offs: Offset from start of this shared memory
|
||||
* @pa: Physical address to return
|
||||
* @returns 0 if offs is within the bounds of this shared memory, else an
|
||||
* error code.
|
||||
*/
|
||||
int tee_shm_get_pa(struct tee_shm *shm, size_t offs, phys_addr_t *pa)
|
||||
{
|
||||
if (offs >= shm->size)
|
||||
return -EINVAL;
|
||||
if (pa)
|
||||
*pa = shm->paddr + offs;
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tee_shm_get_pa);
|
||||
|
||||
/**
|
||||
* tee_shm_get_from_id() - Find shared memory object and increase reference
|
||||
* count
|
||||
* @ctx: Context owning the shared memory
|
||||
* @id: Id of shared memory object
|
||||
* @returns a pointer to 'struct tee_shm' on success or an ERR_PTR on failure
|
||||
*/
|
||||
struct tee_shm *tee_shm_get_from_id(struct tee_context *ctx, int id)
|
||||
{
|
||||
struct tee_device *teedev;
|
||||
struct tee_shm *shm;
|
||||
|
||||
if (!ctx)
|
||||
return ERR_PTR(-EINVAL);
|
||||
|
||||
teedev = ctx->teedev;
|
||||
mutex_lock(&teedev->mutex);
|
||||
shm = idr_find(&teedev->idr, id);
|
||||
if (!shm || shm->ctx != ctx)
|
||||
shm = ERR_PTR(-EINVAL);
|
||||
else if (shm->flags & TEE_SHM_DMA_BUF)
|
||||
get_dma_buf(shm->dmabuf);
|
||||
mutex_unlock(&teedev->mutex);
|
||||
return shm;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tee_shm_get_from_id);
|
||||
|
||||
/**
|
||||
* tee_shm_get_id() - Get id of a shared memory object
|
||||
* @shm: Shared memory handle
|
||||
* @returns id
|
||||
*/
|
||||
int tee_shm_get_id(struct tee_shm *shm)
|
||||
{
|
||||
return shm->id;
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tee_shm_get_id);
|
||||
|
||||
/**
|
||||
* tee_shm_put() - Decrease reference count on a shared memory handle
|
||||
* @shm: Shared memory handle
|
||||
*/
|
||||
void tee_shm_put(struct tee_shm *shm)
|
||||
{
|
||||
if (shm->flags & TEE_SHM_DMA_BUF)
|
||||
dma_buf_put(shm->dmabuf);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tee_shm_put);
|
||||
156
drivers/tee/tee_shm_pool.c
Normal file
156
drivers/tee/tee_shm_pool.c
Normal file
@ -0,0 +1,156 @@
|
||||
/*
|
||||
* Copyright (c) 2015, Linaro Limited
|
||||
*
|
||||
* This software is licensed under the terms of the GNU General Public
|
||||
* License version 2, as published by the Free Software Foundation, and
|
||||
* may be copied, distributed, and modified under those terms.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
*/
|
||||
#include <linux/device.h>
|
||||
#include <linux/dma-buf.h>
|
||||
#include <linux/genalloc.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/tee_drv.h>
|
||||
#include "tee_private.h"
|
||||
|
||||
static int pool_op_gen_alloc(struct tee_shm_pool_mgr *poolm,
|
||||
struct tee_shm *shm, size_t size)
|
||||
{
|
||||
unsigned long va;
|
||||
struct gen_pool *genpool = poolm->private_data;
|
||||
size_t s = roundup(size, 1 << genpool->min_alloc_order);
|
||||
|
||||
va = gen_pool_alloc(genpool, s);
|
||||
if (!va)
|
||||
return -ENOMEM;
|
||||
|
||||
memset((void *)va, 0, s);
|
||||
shm->kaddr = (void *)va;
|
||||
shm->paddr = gen_pool_virt_to_phys(genpool, va);
|
||||
shm->size = s;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void pool_op_gen_free(struct tee_shm_pool_mgr *poolm,
|
||||
struct tee_shm *shm)
|
||||
{
|
||||
gen_pool_free(poolm->private_data, (unsigned long)shm->kaddr,
|
||||
shm->size);
|
||||
shm->kaddr = NULL;
|
||||
}
|
||||
|
||||
static const struct tee_shm_pool_mgr_ops pool_ops_generic = {
|
||||
.alloc = pool_op_gen_alloc,
|
||||
.free = pool_op_gen_free,
|
||||
};
|
||||
|
||||
static void pool_res_mem_destroy(struct tee_shm_pool *pool)
|
||||
{
|
||||
gen_pool_destroy(pool->private_mgr.private_data);
|
||||
gen_pool_destroy(pool->dma_buf_mgr.private_data);
|
||||
}
|
||||
|
||||
static int pool_res_mem_mgr_init(struct tee_shm_pool_mgr *mgr,
|
||||
struct tee_shm_pool_mem_info *info,
|
||||
int min_alloc_order)
|
||||
{
|
||||
size_t page_mask = PAGE_SIZE - 1;
|
||||
struct gen_pool *genpool = NULL;
|
||||
int rc;
|
||||
|
||||
/*
|
||||
* Start and end must be page aligned
|
||||
*/
|
||||
if ((info->vaddr & page_mask) || (info->paddr & page_mask) ||
|
||||
(info->size & page_mask))
|
||||
return -EINVAL;
|
||||
|
||||
genpool = gen_pool_create(min_alloc_order, -1);
|
||||
if (!genpool)
|
||||
return -ENOMEM;
|
||||
|
||||
gen_pool_set_algo(genpool, gen_pool_best_fit, NULL);
|
||||
rc = gen_pool_add_virt(genpool, info->vaddr, info->paddr, info->size,
|
||||
-1);
|
||||
if (rc) {
|
||||
gen_pool_destroy(genpool);
|
||||
return rc;
|
||||
}
|
||||
|
||||
mgr->private_data = genpool;
|
||||
mgr->ops = &pool_ops_generic;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* tee_shm_pool_alloc_res_mem() - Create a shared memory pool from reserved
|
||||
* memory range
|
||||
* @priv_info: Information for driver private shared memory pool
|
||||
* @dmabuf_info: Information for dma-buf shared memory pool
|
||||
*
|
||||
* Start and end of pools will must be page aligned.
|
||||
*
|
||||
* Allocation with the flag TEE_SHM_DMA_BUF set will use the range supplied
|
||||
* in @dmabuf, others will use the range provided by @priv.
|
||||
*
|
||||
* @returns pointer to a 'struct tee_shm_pool' or an ERR_PTR on failure.
|
||||
*/
|
||||
struct tee_shm_pool *
|
||||
tee_shm_pool_alloc_res_mem(struct tee_shm_pool_mem_info *priv_info,
|
||||
struct tee_shm_pool_mem_info *dmabuf_info)
|
||||
{
|
||||
struct tee_shm_pool *pool = NULL;
|
||||
int ret;
|
||||
|
||||
pool = kzalloc(sizeof(*pool), GFP_KERNEL);
|
||||
if (!pool) {
|
||||
ret = -ENOMEM;
|
||||
goto err;
|
||||
}
|
||||
|
||||
/*
|
||||
* Create the pool for driver private shared memory
|
||||
*/
|
||||
ret = pool_res_mem_mgr_init(&pool->private_mgr, priv_info,
|
||||
3 /* 8 byte aligned */);
|
||||
if (ret)
|
||||
goto err;
|
||||
|
||||
/*
|
||||
* Create the pool for dma_buf shared memory
|
||||
*/
|
||||
ret = pool_res_mem_mgr_init(&pool->dma_buf_mgr, dmabuf_info,
|
||||
PAGE_SHIFT);
|
||||
if (ret)
|
||||
goto err;
|
||||
|
||||
pool->destroy = pool_res_mem_destroy;
|
||||
return pool;
|
||||
err:
|
||||
if (ret == -ENOMEM)
|
||||
pr_err("%s: can't allocate memory for res_mem shared memory pool\n", __func__);
|
||||
if (pool && pool->private_mgr.private_data)
|
||||
gen_pool_destroy(pool->private_mgr.private_data);
|
||||
kfree(pool);
|
||||
return ERR_PTR(ret);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tee_shm_pool_alloc_res_mem);
|
||||
|
||||
/**
|
||||
* tee_shm_pool_free() - Free a shared memory pool
|
||||
* @pool: The shared memory pool to free
|
||||
*
|
||||
* There must be no remaining shared memory allocated from this pool when
|
||||
* this function is called.
|
||||
*/
|
||||
void tee_shm_pool_free(struct tee_shm_pool *pool)
|
||||
{
|
||||
pool->destroy(pool);
|
||||
kfree(pool);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tee_shm_pool_free);
|
||||
277
include/linux/tee_drv.h
Normal file
277
include/linux/tee_drv.h
Normal file
@ -0,0 +1,277 @@
|
||||
/*
|
||||
* Copyright (c) 2015-2016, Linaro Limited
|
||||
*
|
||||
* This software is licensed under the terms of the GNU General Public
|
||||
* License version 2, as published by the Free Software Foundation, and
|
||||
* may be copied, distributed, and modified under those terms.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef __TEE_DRV_H
|
||||
#define __TEE_DRV_H
|
||||
|
||||
#include <linux/types.h>
|
||||
#include <linux/idr.h>
|
||||
#include <linux/list.h>
|
||||
#include <linux/tee.h>
|
||||
|
||||
/*
|
||||
* The file describes the API provided by the generic TEE driver to the
|
||||
* specific TEE driver.
|
||||
*/
|
||||
|
||||
#define TEE_SHM_MAPPED 0x1 /* Memory mapped by the kernel */
|
||||
#define TEE_SHM_DMA_BUF 0x2 /* Memory with dma-buf handle */
|
||||
|
||||
struct tee_device;
|
||||
struct tee_shm;
|
||||
struct tee_shm_pool;
|
||||
|
||||
/**
|
||||
* struct tee_context - driver specific context on file pointer data
|
||||
* @teedev: pointer to this drivers struct tee_device
|
||||
* @list_shm: List of shared memory object owned by this context
|
||||
* @data: driver specific context data, managed by the driver
|
||||
*/
|
||||
struct tee_context {
|
||||
struct tee_device *teedev;
|
||||
struct list_head list_shm;
|
||||
void *data;
|
||||
};
|
||||
|
||||
struct tee_param_memref {
|
||||
size_t shm_offs;
|
||||
size_t size;
|
||||
struct tee_shm *shm;
|
||||
};
|
||||
|
||||
struct tee_param_value {
|
||||
u64 a;
|
||||
u64 b;
|
||||
u64 c;
|
||||
};
|
||||
|
||||
struct tee_param {
|
||||
u64 attr;
|
||||
union {
|
||||
struct tee_param_memref memref;
|
||||
struct tee_param_value value;
|
||||
} u;
|
||||
};
|
||||
|
||||
/**
|
||||
* struct tee_driver_ops - driver operations vtable
|
||||
* @get_version: returns version of driver
|
||||
* @open: called when the device file is opened
|
||||
* @release: release this open file
|
||||
* @open_session: open a new session
|
||||
* @close_session: close a session
|
||||
* @invoke_func: invoke a trusted function
|
||||
* @cancel_req: request cancel of an ongoing invoke or open
|
||||
* @supp_revc: called for supplicant to get a command
|
||||
* @supp_send: called for supplicant to send a response
|
||||
*/
|
||||
struct tee_driver_ops {
|
||||
void (*get_version)(struct tee_device *teedev,
|
||||
struct tee_ioctl_version_data *vers);
|
||||
int (*open)(struct tee_context *ctx);
|
||||
void (*release)(struct tee_context *ctx);
|
||||
int (*open_session)(struct tee_context *ctx,
|
||||
struct tee_ioctl_open_session_arg *arg,
|
||||
struct tee_param *param);
|
||||
int (*close_session)(struct tee_context *ctx, u32 session);
|
||||
int (*invoke_func)(struct tee_context *ctx,
|
||||
struct tee_ioctl_invoke_arg *arg,
|
||||
struct tee_param *param);
|
||||
int (*cancel_req)(struct tee_context *ctx, u32 cancel_id, u32 session);
|
||||
int (*supp_recv)(struct tee_context *ctx, u32 *func, u32 *num_params,
|
||||
struct tee_param *param);
|
||||
int (*supp_send)(struct tee_context *ctx, u32 ret, u32 num_params,
|
||||
struct tee_param *param);
|
||||
};
|
||||
|
||||
/**
|
||||
* struct tee_desc - Describes the TEE driver to the subsystem
|
||||
* @name: name of driver
|
||||
* @ops: driver operations vtable
|
||||
* @owner: module providing the driver
|
||||
* @flags: Extra properties of driver, defined by TEE_DESC_* below
|
||||
*/
|
||||
#define TEE_DESC_PRIVILEGED 0x1
|
||||
struct tee_desc {
|
||||
const char *name;
|
||||
const struct tee_driver_ops *ops;
|
||||
struct module *owner;
|
||||
u32 flags;
|
||||
};
|
||||
|
||||
/**
|
||||
* tee_device_alloc() - Allocate a new struct tee_device instance
|
||||
* @teedesc: Descriptor for this driver
|
||||
* @dev: Parent device for this device
|
||||
* @pool: Shared memory pool, NULL if not used
|
||||
* @driver_data: Private driver data for this device
|
||||
*
|
||||
* Allocates a new struct tee_device instance. The device is
|
||||
* removed by tee_device_unregister().
|
||||
*
|
||||
* @returns a pointer to a 'struct tee_device' or an ERR_PTR on failure
|
||||
*/
|
||||
struct tee_device *tee_device_alloc(const struct tee_desc *teedesc,
|
||||
struct device *dev,
|
||||
struct tee_shm_pool *pool,
|
||||
void *driver_data);
|
||||
|
||||
/**
|
||||
* tee_device_register() - Registers a TEE device
|
||||
* @teedev: Device to register
|
||||
*
|
||||
* tee_device_unregister() need to be called to remove the @teedev if
|
||||
* this function fails.
|
||||
*
|
||||
* @returns < 0 on failure
|
||||
*/
|
||||
int tee_device_register(struct tee_device *teedev);
|
||||
|
||||
/**
|
||||
* tee_device_unregister() - Removes a TEE device
|
||||
* @teedev: Device to unregister
|
||||
*
|
||||
* This function should be called to remove the @teedev even if
|
||||
* tee_device_register() hasn't been called yet. Does nothing if
|
||||
* @teedev is NULL.
|
||||
*/
|
||||
void tee_device_unregister(struct tee_device *teedev);
|
||||
|
||||
/**
|
||||
* struct tee_shm_pool_mem_info - holds information needed to create a shared
|
||||
* memory pool
|
||||
* @vaddr: Virtual address of start of pool
|
||||
* @paddr: Physical address of start of pool
|
||||
* @size: Size in bytes of the pool
|
||||
*/
|
||||
struct tee_shm_pool_mem_info {
|
||||
unsigned long vaddr;
|
||||
phys_addr_t paddr;
|
||||
size_t size;
|
||||
};
|
||||
|
||||
/**
|
||||
* tee_shm_pool_alloc_res_mem() - Create a shared memory pool from reserved
|
||||
* memory range
|
||||
* @priv_info: Information for driver private shared memory pool
|
||||
* @dmabuf_info: Information for dma-buf shared memory pool
|
||||
*
|
||||
* Start and end of pools will must be page aligned.
|
||||
*
|
||||
* Allocation with the flag TEE_SHM_DMA_BUF set will use the range supplied
|
||||
* in @dmabuf, others will use the range provided by @priv.
|
||||
*
|
||||
* @returns pointer to a 'struct tee_shm_pool' or an ERR_PTR on failure.
|
||||
*/
|
||||
struct tee_shm_pool *
|
||||
tee_shm_pool_alloc_res_mem(struct tee_shm_pool_mem_info *priv_info,
|
||||
struct tee_shm_pool_mem_info *dmabuf_info);
|
||||
|
||||
/**
|
||||
* tee_shm_pool_free() - Free a shared memory pool
|
||||
* @pool: The shared memory pool to free
|
||||
*
|
||||
* The must be no remaining shared memory allocated from this pool when
|
||||
* this function is called.
|
||||
*/
|
||||
void tee_shm_pool_free(struct tee_shm_pool *pool);
|
||||
|
||||
/**
|
||||
* tee_get_drvdata() - Return driver_data pointer
|
||||
* @returns the driver_data pointer supplied to tee_register().
|
||||
*/
|
||||
void *tee_get_drvdata(struct tee_device *teedev);
|
||||
|
||||
/**
|
||||
* tee_shm_alloc() - Allocate shared memory
|
||||
* @ctx: Context that allocates the shared memory
|
||||
* @size: Requested size of shared memory
|
||||
* @flags: Flags setting properties for the requested shared memory.
|
||||
*
|
||||
* Memory allocated as global shared memory is automatically freed when the
|
||||
* TEE file pointer is closed. The @flags field uses the bits defined by
|
||||
* TEE_SHM_* above. TEE_SHM_MAPPED must currently always be set. If
|
||||
* TEE_SHM_DMA_BUF global shared memory will be allocated and associated
|
||||
* with a dma-buf handle, else driver private memory.
|
||||
*
|
||||
* @returns a pointer to 'struct tee_shm'
|
||||
*/
|
||||
struct tee_shm *tee_shm_alloc(struct tee_context *ctx, size_t size, u32 flags);
|
||||
|
||||
/**
|
||||
* tee_shm_free() - Free shared memory
|
||||
* @shm: Handle to shared memory to free
|
||||
*/
|
||||
void tee_shm_free(struct tee_shm *shm);
|
||||
|
||||
/**
|
||||
* tee_shm_put() - Decrease reference count on a shared memory handle
|
||||
* @shm: Shared memory handle
|
||||
*/
|
||||
void tee_shm_put(struct tee_shm *shm);
|
||||
|
||||
/**
|
||||
* tee_shm_va2pa() - Get physical address of a virtual address
|
||||
* @shm: Shared memory handle
|
||||
* @va: Virtual address to tranlsate
|
||||
* @pa: Returned physical address
|
||||
* @returns 0 on success and < 0 on failure
|
||||
*/
|
||||
int tee_shm_va2pa(struct tee_shm *shm, void *va, phys_addr_t *pa);
|
||||
|
||||
/**
|
||||
* tee_shm_pa2va() - Get virtual address of a physical address
|
||||
* @shm: Shared memory handle
|
||||
* @pa: Physical address to tranlsate
|
||||
* @va: Returned virtual address
|
||||
* @returns 0 on success and < 0 on failure
|
||||
*/
|
||||
int tee_shm_pa2va(struct tee_shm *shm, phys_addr_t pa, void **va);
|
||||
|
||||
/**
|
||||
* tee_shm_get_va() - Get virtual address of a shared memory plus an offset
|
||||
* @shm: Shared memory handle
|
||||
* @offs: Offset from start of this shared memory
|
||||
* @returns virtual address of the shared memory + offs if offs is within
|
||||
* the bounds of this shared memory, else an ERR_PTR
|
||||
*/
|
||||
void *tee_shm_get_va(struct tee_shm *shm, size_t offs);
|
||||
|
||||
/**
|
||||
* tee_shm_get_pa() - Get physical address of a shared memory plus an offset
|
||||
* @shm: Shared memory handle
|
||||
* @offs: Offset from start of this shared memory
|
||||
* @pa: Physical address to return
|
||||
* @returns 0 if offs is within the bounds of this shared memory, else an
|
||||
* error code.
|
||||
*/
|
||||
int tee_shm_get_pa(struct tee_shm *shm, size_t offs, phys_addr_t *pa);
|
||||
|
||||
/**
|
||||
* tee_shm_get_id() - Get id of a shared memory object
|
||||
* @shm: Shared memory handle
|
||||
* @returns id
|
||||
*/
|
||||
int tee_shm_get_id(struct tee_shm *shm);
|
||||
|
||||
/**
|
||||
* tee_shm_get_from_id() - Find shared memory object and increase reference
|
||||
* count
|
||||
* @ctx: Context owning the shared memory
|
||||
* @id: Id of shared memory object
|
||||
* @returns a pointer to 'struct tee_shm' on success or an ERR_PTR on failure
|
||||
*/
|
||||
struct tee_shm *tee_shm_get_from_id(struct tee_context *ctx, int id);
|
||||
|
||||
#endif /*__TEE_DRV_H*/
|
||||
346
include/uapi/linux/tee.h
Normal file
346
include/uapi/linux/tee.h
Normal file
@ -0,0 +1,346 @@
|
||||
/*
|
||||
* Copyright (c) 2015-2016, Linaro Limited
|
||||
* All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions are met:
|
||||
*
|
||||
* 1. Redistributions of source code must retain the above copyright notice,
|
||||
* this list of conditions and the following disclaimer.
|
||||
*
|
||||
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
||||
* this list of conditions and the following disclaimer in the documentation
|
||||
* and/or other materials provided with the distribution.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
||||
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
|
||||
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||||
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||||
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||||
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||||
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||||
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||||
* POSSIBILITY OF SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#ifndef __TEE_H
|
||||
#define __TEE_H
|
||||
|
||||
#include <linux/ioctl.h>
|
||||
#include <linux/types.h>
|
||||
|
||||
/*
|
||||
* This file describes the API provided by a TEE driver to user space.
|
||||
*
|
||||
* Each TEE driver defines a TEE specific protocol which is used for the
|
||||
* data passed back and forth using TEE_IOC_CMD.
|
||||
*/
|
||||
|
||||
/* Helpers to make the ioctl defines */
|
||||
#define TEE_IOC_MAGIC 0xa4
|
||||
#define TEE_IOC_BASE 0
|
||||
|
||||
/* Flags relating to shared memory */
|
||||
#define TEE_IOCTL_SHM_MAPPED 0x1 /* memory mapped in normal world */
|
||||
#define TEE_IOCTL_SHM_DMA_BUF 0x2 /* dma-buf handle on shared memory */
|
||||
|
||||
#define TEE_MAX_ARG_SIZE 1024
|
||||
|
||||
#define TEE_GEN_CAP_GP (1 << 0)/* GlobalPlatform compliant TEE */
|
||||
|
||||
/*
|
||||
* TEE Implementation ID
|
||||
*/
|
||||
#define TEE_IMPL_ID_OPTEE 1
|
||||
|
||||
/*
|
||||
* OP-TEE specific capabilities
|
||||
*/
|
||||
#define TEE_OPTEE_CAP_TZ (1 << 0)
|
||||
|
||||
/**
|
||||
* struct tee_ioctl_version_data - TEE version
|
||||
* @impl_id: [out] TEE implementation id
|
||||
* @impl_caps: [out] Implementation specific capabilities
|
||||
* @gen_caps: [out] Generic capabilities, defined by TEE_GEN_CAPS_* above
|
||||
*
|
||||
* Identifies the TEE implementation, @impl_id is one of TEE_IMPL_ID_* above.
|
||||
* @impl_caps is implementation specific, for example TEE_OPTEE_CAP_*
|
||||
* is valid when @impl_id == TEE_IMPL_ID_OPTEE.
|
||||
*/
|
||||
struct tee_ioctl_version_data {
|
||||
__u32 impl_id;
|
||||
__u32 impl_caps;
|
||||
__u32 gen_caps;
|
||||
};
|
||||
|
||||
/**
|
||||
* TEE_IOC_VERSION - query version of TEE
|
||||
*
|
||||
* Takes a tee_ioctl_version_data struct and returns with the TEE version
|
||||
* data filled in.
|
||||
*/
|
||||
#define TEE_IOC_VERSION _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 0, \
|
||||
struct tee_ioctl_version_data)
|
||||
|
||||
/**
|
||||
* struct tee_ioctl_shm_alloc_data - Shared memory allocate argument
|
||||
* @size: [in/out] Size of shared memory to allocate
|
||||
* @flags: [in/out] Flags to/from allocation.
|
||||
* @id: [out] Identifier of the shared memory
|
||||
*
|
||||
* The flags field should currently be zero as input. Updated by the call
|
||||
* with actual flags as defined by TEE_IOCTL_SHM_* above.
|
||||
* This structure is used as argument for TEE_IOC_SHM_ALLOC below.
|
||||
*/
|
||||
struct tee_ioctl_shm_alloc_data {
|
||||
__u64 size;
|
||||
__u32 flags;
|
||||
__s32 id;
|
||||
};
|
||||
|
||||
/**
|
||||
* TEE_IOC_SHM_ALLOC - allocate shared memory
|
||||
*
|
||||
* Allocates shared memory between the user space process and secure OS.
|
||||
*
|
||||
* Returns a file descriptor on success or < 0 on failure
|
||||
*
|
||||
* The returned file descriptor is used to map the shared memory into user
|
||||
* space. The shared memory is freed when the descriptor is closed and the
|
||||
* memory is unmapped.
|
||||
*/
|
||||
#define TEE_IOC_SHM_ALLOC _IOWR(TEE_IOC_MAGIC, TEE_IOC_BASE + 1, \
|
||||
struct tee_ioctl_shm_alloc_data)
|
||||
|
||||
/**
|
||||
* struct tee_ioctl_buf_data - Variable sized buffer
|
||||
* @buf_ptr: [in] A __user pointer to a buffer
|
||||
* @buf_len: [in] Length of the buffer above
|
||||
*
|
||||
* Used as argument for TEE_IOC_OPEN_SESSION, TEE_IOC_INVOKE,
|
||||
* TEE_IOC_SUPPL_RECV, and TEE_IOC_SUPPL_SEND below.
|
||||
*/
|
||||
struct tee_ioctl_buf_data {
|
||||
__u64 buf_ptr;
|
||||
__u64 buf_len;
|
||||
};
|
||||
|
||||
/*
|
||||
* Attributes for struct tee_ioctl_param, selects field in the union
|
||||
*/
|
||||
#define TEE_IOCTL_PARAM_ATTR_TYPE_NONE 0 /* parameter not used */
|
||||
|
||||
/*
|
||||
* These defines value parameters (struct tee_ioctl_param_value)
|
||||
*/
|
||||
#define TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INPUT 1
|
||||
#define TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_OUTPUT 2
|
||||
#define TEE_IOCTL_PARAM_ATTR_TYPE_VALUE_INOUT 3 /* input and output */
|
||||
|
||||
/*
|
||||
* These defines shared memory reference parameters (struct
|
||||
* tee_ioctl_param_memref)
|
||||
*/
|
||||
#define TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INPUT 5
|
||||
#define TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_OUTPUT 6
|
||||
#define TEE_IOCTL_PARAM_ATTR_TYPE_MEMREF_INOUT 7 /* input and output */
|
||||
|
||||
/*
|
||||
* Mask for the type part of the attribute, leaves room for more types
|
||||
*/
|
||||
#define TEE_IOCTL_PARAM_ATTR_TYPE_MASK 0xff
|
||||
|
||||
/*
|
||||
* Matches TEEC_LOGIN_* in GP TEE Client API
|
||||
* Are only defined for GP compliant TEEs
|
||||
*/
|
||||
#define TEE_IOCTL_LOGIN_PUBLIC 0
|
||||
#define TEE_IOCTL_LOGIN_USER 1
|
||||
#define TEE_IOCTL_LOGIN_GROUP 2
|
||||
#define TEE_IOCTL_LOGIN_APPLICATION 4
|
||||
#define TEE_IOCTL_LOGIN_USER_APPLICATION 5
|
||||
#define TEE_IOCTL_LOGIN_GROUP_APPLICATION 6
|
||||
|
||||
/**
|
||||
* struct tee_ioctl_param - parameter
|
||||
* @attr: attributes
|
||||
* @a: if a memref, offset into the shared memory object, else a value parameter
|
||||
* @b: if a memref, size of the buffer, else a value parameter
|
||||
* @c: if a memref, shared memory identifier, else a value parameter
|
||||
*
|
||||
* @attr & TEE_PARAM_ATTR_TYPE_MASK indicates if memref or value is used in
|
||||
* the union. TEE_PARAM_ATTR_TYPE_VALUE_* indicates value and
|
||||
* TEE_PARAM_ATTR_TYPE_MEMREF_* indicates memref. TEE_PARAM_ATTR_TYPE_NONE
|
||||
* indicates that none of the members are used.
|
||||
*
|
||||
* Shared memory is allocated with TEE_IOC_SHM_ALLOC which returns an
|
||||
* identifier representing the shared memory object. A memref can reference
|
||||
* a part of a shared memory by specifying an offset (@a) and size (@b) of
|
||||
* the object. To supply the entire shared memory object set the offset
|
||||
* (@a) to 0 and size (@b) to the previously returned size of the object.
|
||||
*/
|
||||
struct tee_ioctl_param {
|
||||
__u64 attr;
|
||||
__u64 a;
|
||||
__u64 b;
|
||||
__u64 c;
|
||||
};
|
||||
|
||||
#define TEE_IOCTL_UUID_LEN 16
|
||||
|
||||
/**
|
||||
* struct tee_ioctl_open_session_arg - Open session argument
|
||||
* @uuid: [in] UUID of the Trusted Application
|
||||
* @clnt_uuid: [in] UUID of client
|
||||
* @clnt_login: [in] Login class of client, TEE_IOCTL_LOGIN_* above
|
||||
* @cancel_id: [in] Cancellation id, a unique value to identify this request
|
||||
* @session: [out] Session id
|
||||
* @ret: [out] return value
|
||||
* @ret_origin [out] origin of the return value
|
||||
* @num_params [in] number of parameters following this struct
|
||||
*/
|
||||
struct tee_ioctl_open_session_arg {
|
||||
__u8 uuid[TEE_IOCTL_UUID_LEN];
|
||||
__u8 clnt_uuid[TEE_IOCTL_UUID_LEN];
|
||||
__u32 clnt_login;
|
||||
__u32 cancel_id;
|
||||
__u32 session;
|
||||
__u32 ret;
|
||||
__u32 ret_origin;
|
||||
__u32 num_params;
|
||||
/* num_params tells the actual number of element in params */
|
||||
struct tee_ioctl_param params[];
|
||||
};
|
||||
|
||||
/**
|
||||
* TEE_IOC_OPEN_SESSION - opens a session to a Trusted Application
|
||||
*
|
||||
* Takes a struct tee_ioctl_buf_data which contains a struct
|
||||
* tee_ioctl_open_session_arg followed by any array of struct
|
||||
* tee_ioctl_param
|
||||
*/
|
||||
#define TEE_IOC_OPEN_SESSION _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 2, \
|
||||
struct tee_ioctl_buf_data)
|
||||
|
||||
/**
|
||||
* struct tee_ioctl_invoke_func_arg - Invokes a function in a Trusted
|
||||
* Application
|
||||
* @func: [in] Trusted Application function, specific to the TA
|
||||
* @session: [in] Session id
|
||||
* @cancel_id: [in] Cancellation id, a unique value to identify this request
|
||||
* @ret: [out] return value
|
||||
* @ret_origin [out] origin of the return value
|
||||
* @num_params [in] number of parameters following this struct
|
||||
*/
|
||||
struct tee_ioctl_invoke_arg {
|
||||
__u32 func;
|
||||
__u32 session;
|
||||
__u32 cancel_id;
|
||||
__u32 ret;
|
||||
__u32 ret_origin;
|
||||
__u32 num_params;
|
||||
/* num_params tells the actual number of element in params */
|
||||
struct tee_ioctl_param params[];
|
||||
};
|
||||
|
||||
/**
|
||||
* TEE_IOC_INVOKE - Invokes a function in a Trusted Application
|
||||
*
|
||||
* Takes a struct tee_ioctl_buf_data which contains a struct
|
||||
* tee_invoke_func_arg followed by any array of struct tee_param
|
||||
*/
|
||||
#define TEE_IOC_INVOKE _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 3, \
|
||||
struct tee_ioctl_buf_data)
|
||||
|
||||
/**
|
||||
* struct tee_ioctl_cancel_arg - Cancels an open session or invoke ioctl
|
||||
* @cancel_id: [in] Cancellation id, a unique value to identify this request
|
||||
* @session: [in] Session id, if the session is opened, else set to 0
|
||||
*/
|
||||
struct tee_ioctl_cancel_arg {
|
||||
__u32 cancel_id;
|
||||
__u32 session;
|
||||
};
|
||||
|
||||
/**
|
||||
* TEE_IOC_CANCEL - Cancels an open session or invoke
|
||||
*/
|
||||
#define TEE_IOC_CANCEL _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 4, \
|
||||
struct tee_ioctl_cancel_arg)
|
||||
|
||||
/**
|
||||
* struct tee_ioctl_close_session_arg - Closes an open session
|
||||
* @session: [in] Session id
|
||||
*/
|
||||
struct tee_ioctl_close_session_arg {
|
||||
__u32 session;
|
||||
};
|
||||
|
||||
/**
|
||||
* TEE_IOC_CLOSE_SESSION - Closes a session
|
||||
*/
|
||||
#define TEE_IOC_CLOSE_SESSION _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 5, \
|
||||
struct tee_ioctl_close_session_arg)
|
||||
|
||||
/**
|
||||
* struct tee_iocl_supp_recv_arg - Receive a request for a supplicant function
|
||||
* @func: [in] supplicant function
|
||||
* @num_params [in/out] number of parameters following this struct
|
||||
*
|
||||
* @num_params is the number of params that tee-supplicant has room to
|
||||
* receive when input, @num_params is the number of actual params
|
||||
* tee-supplicant receives when output.
|
||||
*/
|
||||
struct tee_iocl_supp_recv_arg {
|
||||
__u32 func;
|
||||
__u32 num_params;
|
||||
/* num_params tells the actual number of element in params */
|
||||
struct tee_ioctl_param params[];
|
||||
};
|
||||
|
||||
/**
|
||||
* TEE_IOC_SUPPL_RECV - Receive a request for a supplicant function
|
||||
*
|
||||
* Takes a struct tee_ioctl_buf_data which contains a struct
|
||||
* tee_iocl_supp_recv_arg followed by any array of struct tee_param
|
||||
*/
|
||||
#define TEE_IOC_SUPPL_RECV _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 6, \
|
||||
struct tee_ioctl_buf_data)
|
||||
|
||||
/**
|
||||
* struct tee_iocl_supp_send_arg - Send a response to a received request
|
||||
* @ret: [out] return value
|
||||
* @num_params [in] number of parameters following this struct
|
||||
*/
|
||||
struct tee_iocl_supp_send_arg {
|
||||
__u32 ret;
|
||||
__u32 num_params;
|
||||
/* num_params tells the actual number of element in params */
|
||||
struct tee_ioctl_param params[];
|
||||
};
|
||||
|
||||
/**
|
||||
* TEE_IOC_SUPPL_SEND - Receive a request for a supplicant function
|
||||
*
|
||||
* Takes a struct tee_ioctl_buf_data which contains a struct
|
||||
* tee_iocl_supp_send_arg followed by any array of struct tee_param
|
||||
*/
|
||||
#define TEE_IOC_SUPPL_SEND _IOR(TEE_IOC_MAGIC, TEE_IOC_BASE + 7, \
|
||||
struct tee_ioctl_buf_data)
|
||||
|
||||
/*
|
||||
* Five syscalls are used when communicating with the TEE driver.
|
||||
* open(): opens the device associated with the driver
|
||||
* ioctl(): as described above operating on the file descriptor from open()
|
||||
* close(): two cases
|
||||
* - closes the device file descriptor
|
||||
* - closes a file descriptor connected to allocated shared memory
|
||||
* mmap(): maps shared memory into user space using information from struct
|
||||
* tee_ioctl_shm_alloc_data
|
||||
* munmap(): unmaps previously shared memory
|
||||
*/
|
||||
|
||||
#endif /*__TEE_H*/
|
||||
Loading…
Reference in New Issue
Block a user